Function Expression Stack at time s

the expression stack at time s.

Format:

Expression Stack at time s

Input:

Output:

Conditional properties that reference this function:

• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = Python list elements
  • Expression Stack at time t = [ ]

  then Expression Stack at time (t + 1) = [ [ Python list elements, [ ] ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = Python list elements
  • Expression Stack at time t = [ ]

  then the line at time (t + 1) = i

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = Python list elements
  • Expression Stack at time t = [ ]

  then the tab at time (t + 1) = j

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = Python list elements
  • Expression Stack at time t = [ ]

  then Value Stack at time (t + 1) = [ [ ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = Python list elements
  • Expression Stack at time t = [ ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = Python list elements
  • Expression Stack at time t = [ ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = Python list elements
  • Expression Stack at time t = [ ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = Python list elements
  • Expression Stack at time t = [ ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if Expression Stack at time t = [ [ Python list elements, ys ], rest ], then Expression Stack at time (t + 1) = [ elements, [ [ Python list elements, ys ], rest ] ] (link)
• if Expression Stack at time t = [ [ Python list elements, ys ], rest ], then Value Stack at time (t + 1) = [ [ ], Value Stack at time t ] (link)
• if Expression Stack at time t = [ [ Python list elements, ys ], rest ], then Parameters List at time (t + 1) = None (link)
• if Expression Stack at time t = [ [ Python list elements, ys ], rest ], then the line at time (t + 1) = the line at time t (link)
• if Expression Stack at time t = [ [ Python list elements, ys ], rest ], then the tab at time (t + 1) = the tab at time t (link)
• if Expression Stack at time t = [ [ Python list elements, ys ], rest ], then Variables Map at time (t + 1) = Variables Map at time t (link)
• if Expression Stack at time t = [ [ Python list elements, ys ], rest ], then Control Map at time (t + 1) = Control Map at time t (link)
• if Expression Stack at time t = [ [ Python list elements, ys ], rest ], then Python Object Store at time (t + 1) = Python Object Store at time t (link)
• if Expression Stack at time t = [ [ Python list elements, ys ], rest ], then Context Stack at time (t + 1) = Context Stack at time t (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ Python list elements, ys ], rest ] ]
  • Value Stack at time t = [ values, [ next_level, other_levels ] ]

  then Value Stack at time (t + 1) = [ [ Python reference (length of stack (Python Object Store at time t)), next_level ], other_levels ]

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ Python list elements, ys ], rest ] ]
  • Value Stack at time t = [ values, [ next_level, other_levels ] ]

  then Python Object Store at time (t + 1) = result of appending (Python list (reverse of values)) to (Python Object Store at time t)

  (link)
• if Expression Stack at time t = [ [ ], [ [ Python list elements, ys ], rest ] ], then Expression Stack at time (t + 1) = [ ys, rest ] (link)
• if Expression Stack at time t = [ [ ], [ [ Python list elements, ys ], rest ] ], then the line at time (t + 1) = the line at time t (link)
• if Expression Stack at time t = [ [ ], [ [ Python list elements, ys ], rest ] ], then the tab at time (t + 1) = the tab at time t (link)
• if Expression Stack at time t = [ [ ], [ [ Python list elements, ys ], rest ] ], then Variables Map at time (t + 1) = Variables Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ Python list elements, ys ], rest ] ], then Control Map at time (t + 1) = Control Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ Python list elements, ys ], rest ] ], then Context Stack at time (t + 1) = Context Stack at time t (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python list elements)
  • Expression Stack at time t = [ ]

  then Expression Stack at time (t + 1) = [ [ Python list elements, [ ] ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python list elements)
  • Expression Stack at time t = [ ]

  then the line at time (t + 1) = i

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python list elements)
  • Expression Stack at time t = [ ]

  then the tab at time (t + 1) = j

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python list elements)
  • Expression Stack at time t = [ ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python list elements)
  • Expression Stack at time t = [ ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python list elements)
  • Expression Stack at time t = [ ]

  then Value Stack at time (t + 1) = [ [ ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python list elements)
  • Expression Stack at time t = [ ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python list elements)
  • Expression Stack at time t = [ ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj_name.method_name(args)
  • Expression Stack at time t = [ ]

  then Expression Stack at time (t + 1) = [ [ obj_name.method_name(args), [ ] ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj_name.method_name(args)
  • Expression Stack at time t = [ ]

  then the line at time (t + 1) = i

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj_name.method_name(args)
  • Expression Stack at time t = [ ]

  then the tab at time (t + 1) = j

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj_name.method_name(args)
  • Expression Stack at time t = [ ]

  then Value Stack at time (t + 1) = [ [ ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj_name.method_name(args)
  • Expression Stack at time t = [ ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj_name.method_name(args)
  • Expression Stack at time t = [ ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj_name.method_name(args)
  • Expression Stack at time t = [ ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj_name.method_name(args)
  • Expression Stack at time t = [ ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target target and expression (obj_name.method_name(args))
  • Expression Stack at time t = [ ]

  then Expression Stack at time (t + 1) = [ [ obj_name.method_name(args), [ ] ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target target and expression (obj_name.method_name(args))
  • Expression Stack at time t = [ ]

  then the line at time (t + 1) = i

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target target and expression (obj_name.method_name(args))
  • Expression Stack at time t = [ ]

  then the tab at time (t + 1) = j

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target target and expression (obj_name.method_name(args))
  • Expression Stack at time t = [ ]

  then Value Stack at time (t + 1) = [ [ ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target target and expression (obj_name.method_name(args))
  • Expression Stack at time t = [ ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target target and expression (obj_name.method_name(args))
  • Expression Stack at time t = [ ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target target and expression (obj_name.method_name(args))
  • Expression Stack at time t = [ ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target target and expression (obj_name.method_name(args))
  • Expression Stack at time t = [ ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if Expression Stack at time t = [ [ obj_name.method_name(args), ys ], rest ], then Expression Stack at time (t + 1) = [ args, [ [ obj_name.method_name(args), ys ], rest ] ] (link)
• if Expression Stack at time t = [ [ obj_name.method_name(args), ys ], rest ], then Value Stack at time (t + 1) = [ [ ], Value Stack at time t ] (link)
• if Expression Stack at time t = [ [ obj_name.method_name(args), ys ], rest ], then Parameters List at time (t + 1) = None (link)
• if Expression Stack at time t = [ [ obj_name.method_name(args), ys ], rest ], then the line at time (t + 1) = the line at time t (link)
• if Expression Stack at time t = [ [ obj_name.method_name(args), ys ], rest ], then the tab at time (t + 1) = the tab at time t (link)
• if Expression Stack at time t = [ [ obj_name.method_name(args), ys ], rest ], then Variables Map at time (t + 1) = Variables Map at time t (link)
• if Expression Stack at time t = [ [ obj_name.method_name(args), ys ], rest ], then Control Map at time (t + 1) = Control Map at time t (link)
• if Expression Stack at time t = [ [ obj_name.method_name(args), ys ], rest ], then Python Object Store at time (t + 1) = Python Object Store at time t (link)
• if Expression Stack at time t = [ [ obj_name.method_name(args), ys ], rest ], then Context Stack at time (t + 1) = Context Stack at time t (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ obj.append(x), ys ], rest ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ next_level, other_levels ] ]
  • value at obj in map (Variables Map at time t) = Python reference idx
  • the element at index idx of stack (Python Object Store at time t) = Python list entries

  then Python Object Store at time (t + 1) = result of storing (Python list (result of appending value to entries)) at index idx of stack (Python Object Store at time t)

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ obj.append(x), ys ], rest ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ next_level, other_levels ] ]
  • value at obj in map (Variables Map at time t) = Python reference idx
  • the element at index idx of stack (Python Object Store at time t) = Python list entries

  then Value Stack at time (t + 1) = [ [ None, next_level ], other_levels ]

  (link)
• if Expression Stack at time t = [ [ ], [ [ obj.append(x), ys ], rest ] ], then Expression Stack at time (t + 1) = [ ys, rest ] (link)
• if Expression Stack at time t = [ [ ], [ [ obj.append(x), ys ], rest ] ], then the line at time (t + 1) = the line at time t (link)
• if Expression Stack at time t = [ [ ], [ [ obj.append(x), ys ], rest ] ], then the tab at time (t + 1) = the tab at time t (link)
• if Expression Stack at time t = [ [ ], [ [ obj.append(x), ys ], rest ] ], then Variables Map at time (t + 1) = Variables Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ obj.append(x), ys ], rest ] ], then Control Map at time (t + 1) = Control Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ obj.append(x), ys ], rest ] ], then Context Stack at time (t + 1) = Context Stack at time t (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj.name(el)
  • Expression Stack at time t = [ [ ], [ ] ]

  then the line at time (t + 1) = i + 1

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj.name(el)
  • Expression Stack at time t = [ [ ], [ ] ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj.name(el)
  • Expression Stack at time t = [ [ ], [ ] ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj.name(el)
  • Expression Stack at time t = [ [ ], [ ] ]

  then the tab at time (t + 1) = the tab at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj.name(el)
  • Expression Stack at time t = [ [ ], [ ] ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj.name(el)
  • Expression Stack at time t = [ [ ], [ ] ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = function call with name: "__getitem__" and arguments: args
  • Expression Stack at time t = [ ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ function call with name: "__getitem__" and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ [ a, [ Python reference idx, [ ] ] ], [ next_level, other_levels ] ]
  • the element at index idx of stack (Python Object Store at time t) = Python list entries

  then Value Stack at time (t + 1) = [ [ the element at index a of stack entries, next_level ], other_levels ]

  (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__getitem__" and arguments: args, ys ], rest ] ], then Expression Stack at time (t + 1) = [ ys, rest ] (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__getitem__" and arguments: args, ys ], rest ] ], then the line at time (t + 1) = the line at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__getitem__" and arguments: args, ys ], rest ] ], then the tab at time (t + 1) = the tab at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__getitem__" and arguments: args, ys ], rest ] ], then Variables Map at time (t + 1) = Variables Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__getitem__" and arguments: args, ys ], rest ] ], then Control Map at time (t + 1) = Control Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__getitem__" and arguments: args, ys ], rest ] ], then Context Stack at time (t + 1) = Context Stack at time t (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = function call with name: "len" and arguments: args
  • Expression Stack at time t = [ ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • Value Stack at time t = [ [ Python reference idx, [ ] ], [ next_level, other_levels ] ]
  • Expression Stack at time t = [ [ ], [ [ function call with name: "len" and arguments: args, ys ], rest ] ]
  • the element at index idx of stack (Python Object Store at time t) = Python list entries

  then Value Stack at time (t + 1) = [ [ length of stack entries, next_level ], other_levels ]

  (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "len" and arguments: args, ys ], rest ] ], then Expression Stack at time (t + 1) = [ ys, rest ] (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "len" and arguments: args, ys ], rest ] ], then the line at time (t + 1) = the line at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "len" and arguments: args, ys ], rest ] ], then the tab at time (t + 1) = the tab at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "len" and arguments: args, ys ], rest ] ], then Variables Map at time (t + 1) = Variables Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "len" and arguments: args, ys ], rest ] ], then Control Map at time (t + 1) = Control Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "len" and arguments: args, ys ], rest ] ], then Context Stack at time (t + 1) = Context Stack at time t (link)
• if the following are true:
  • Value Stack at time t = [ [ a, [ ] ], [ next_level, other_levels ] ]
  • Expression Stack at time t = [ [ ], [ [ name."pop"(args), ys ], rest ] ]
  • value at name in map (Variables Map at time t) = Python reference idx
  • the element at index idx of stack (Python Object Store at time t) = Python list entries

  then Python Object Store at time (t + 1) = result of storing (Python list (stack after popping a value from stack entries at index a)) at index idx of stack (Python Object Store at time t)

  (link)
• if the following are true:
  • Value Stack at time t = [ [ a, [ ] ], [ next_level, other_levels ] ]
  • Expression Stack at time t = [ [ ], [ [ name."pop"(args), ys ], rest ] ]
  • value at name in map (Variables Map at time t) = Python reference idx
  • the element at index idx of stack (Python Object Store at time t) = Python list entries

  then Value Stack at time (t + 1) = [ [ the element at index a of stack entries, next_level ], other_levels ]

  (link)
• if Expression Stack at time t = [ [ ], [ [ name."pop"(args), ys ], rest ] ], then Expression Stack at time (t + 1) = [ ys, rest ] (link)
• if Expression Stack at time t = [ [ ], [ [ name."pop"(args), ys ], rest ] ], then the line at time (t + 1) = the line at time t (link)
• if Expression Stack at time t = [ [ ], [ [ name."pop"(args), ys ], rest ] ], then the tab at time (t + 1) = the tab at time t (link)
• if Expression Stack at time t = [ [ ], [ [ name."pop"(args), ys ], rest ] ], then Variables Map at time (t + 1) = Variables Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ name."pop"(args), ys ], rest ] ], then Control Map at time (t + 1) = Control Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ name."pop"(args), ys ], rest ] ], then Context Stack at time (t + 1) = Context Stack at time t (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = function call with name: "__contains__" and arguments: args
  • Expression Stack at time t = [ ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • Value Stack at time t = [ [ a, [ Python reference idx, [ ] ] ], [ next_level, other_levels ] ]
  • Expression Stack at time t = [ [ ], [ [ function call with name: "__contains__" and arguments: args, ys ], rest ] ]
  • the element at index idx of stack (Python Object Store at time t) = Python list entries

  then Value Stack at time (t + 1) = [ [ stack entries contains a, next_level ], other_levels ]

  (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__contains__" and arguments: args, ys ], rest ] ], then Expression Stack at time (t + 1) = [ ys, rest ] (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__contains__" and arguments: args, ys ], rest ] ], then the line at time (t + 1) = the line at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__contains__" and arguments: args, ys ], rest ] ], then the tab at time (t + 1) = the tab at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__contains__" and arguments: args, ys ], rest ] ], then Variables Map at time (t + 1) = Variables Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__contains__" and arguments: args, ys ], rest ] ], then Control Map at time (t + 1) = Control Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__contains__" and arguments: args, ys ], rest ] ], then Context Stack at time (t + 1) = Context Stack at time t (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = Python dictionary entries
  • Expression Stack at time t = [ ]

  then Expression Stack at time (t + 1) = [ [ Python dictionary entries, [ ] ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = Python dictionary entries
  • Expression Stack at time t = [ ]

  then the line at time (t + 1) = i

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = Python dictionary entries
  • Expression Stack at time t = [ ]

  then the tab at time (t + 1) = j

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = Python dictionary entries
  • Expression Stack at time t = [ ]

  then Value Stack at time (t + 1) = [ [ ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = Python dictionary entries
  • Expression Stack at time t = [ ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = Python dictionary entries
  • Expression Stack at time t = [ ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if Expression Stack at time t = [ [ Python dictionary entries, ys ], rest ], then Expression Stack at time (t + 1) = [ entries, [ [ Python dictionary entries, ys ], rest ] ] (link)
• if Expression Stack at time t = [ [ Python dictionary entries, ys ], rest ], then Value Stack at time (t + 1) = [ [ ], Value Stack at time t ] (link)
• if Expression Stack at time t = [ [ Python dictionary entries, ys ], rest ], then Parameters List at time (t + 1) = None (link)
• if Expression Stack at time t = [ [ Python dictionary entries, ys ], rest ], then the line at time (t + 1) = the line at time t (link)
• if Expression Stack at time t = [ [ Python dictionary entries, ys ], rest ], then the tab at time (t + 1) = the tab at time t (link)
• if Expression Stack at time t = [ [ Python dictionary entries, ys ], rest ], then Variables Map at time (t + 1) = Variables Map at time t (link)
• if Expression Stack at time t = [ [ Python dictionary entries, ys ], rest ], then Control Map at time (t + 1) = Control Map at time t (link)
• if Expression Stack at time t = [ [ Python dictionary entries, ys ], rest ], then Python Object Store at time (t + 1) = Python Object Store at time t (link)
• if Expression Stack at time t = [ [ Python dictionary entries, ys ], rest ], then Context Stack at time (t + 1) = Context Stack at time t (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ Python dictionary entries, ys ], rest ] ]
  • Value Stack at time t = [ values, [ next_level, other_levels ] ]

  then Value Stack at time (t + 1) = [ [ Python reference (length of stack (Python Object Store at time t)), next_level ], other_levels ]

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ Python dictionary entries, ys ], rest ] ]
  • Value Stack at time t = [ values, [ next_level, other_levels ] ]

  then Python Object Store at time (t + 1) = result of appending (Python dictionary (reverse of values)) to (Python Object Store at time t)

  (link)
• if Expression Stack at time t = [ [ ], [ [ Python dictionary entries, ys ], rest ] ], then Expression Stack at time (t + 1) = [ ys, rest ] (link)
• if Expression Stack at time t = [ [ ], [ [ Python dictionary entries, ys ], rest ] ], then the line at time (t + 1) = the line at time t (link)
• if Expression Stack at time t = [ [ ], [ [ Python dictionary entries, ys ], rest ] ], then the tab at time (t + 1) = the tab at time t (link)
• if Expression Stack at time t = [ [ ], [ [ Python dictionary entries, ys ], rest ] ], then Variables Map at time (t + 1) = Variables Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ Python dictionary entries, ys ], rest ] ], then Control Map at time (t + 1) = Control Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ Python dictionary entries, ys ], rest ] ], then Context Stack at time (t + 1) = Context Stack at time t (link)
• if Expression Stack at time t = [ [ entry key: value, ys ], rest ], then Expression Stack at time (t + 1) = [ [ key, [ value, [ ] ] ], [ [ entry key: value, ys ], rest ] ] (link)
• if Expression Stack at time t = [ [ entry key: value, ys ], rest ], then Value Stack at time (t + 1) = [ [ ], Value Stack at time t ] (link)
• if Expression Stack at time t = [ [ entry key: value, ys ], rest ], then Parameters List at time (t + 1) = None (link)
• if Expression Stack at time t = [ [ entry key: value, ys ], rest ], then the line at time (t + 1) = the line at time t (link)
• if Expression Stack at time t = [ [ entry key: value, ys ], rest ], then the tab at time (t + 1) = the tab at time t (link)
• if Expression Stack at time t = [ [ entry key: value, ys ], rest ], then Variables Map at time (t + 1) = Variables Map at time t (link)
• if Expression Stack at time t = [ [ entry key: value, ys ], rest ], then Control Map at time (t + 1) = Control Map at time t (link)
• if Expression Stack at time t = [ [ entry key: value, ys ], rest ], then Python Object Store at time (t + 1) = Python Object Store at time t (link)
• if Expression Stack at time t = [ [ entry key: value, ys ], rest ], then Context Stack at time (t + 1) = Context Stack at time t (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ entry key: value, ys ], rest ] ]
  • Value Stack at time t = [ [ evaluated_value, [ evaluated_key, [ ] ] ], [ next_level, other_levels ] ]

  then Value Stack at time (t + 1) = [ [ entry evaluated_key: evaluated_value, next_level ], other_levels ]

  (link)
• if Expression Stack at time t = [ [ ], [ [ entry key: value, ys ], rest ] ], then Expression Stack at time (t + 1) = [ ys, rest ] (link)
• if Expression Stack at time t = [ [ ], [ [ entry key: value, ys ], rest ] ], then the line at time (t + 1) = the line at time t (link)
• if Expression Stack at time t = [ [ ], [ [ entry key: value, ys ], rest ] ], then the tab at time (t + 1) = the tab at time t (link)
• if Expression Stack at time t = [ [ ], [ [ entry key: value, ys ], rest ] ], then Variables Map at time (t + 1) = Variables Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ entry key: value, ys ], rest ] ], then Control Map at time (t + 1) = Control Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ entry key: value, ys ], rest ] ], then Context Stack at time (t + 1) = Context Stack at time t (link)
• if Expression Stack at time t = [ [ ], [ [ entry key: value, ys ], rest ] ], then Python Object Store at time (t + 1) = Python Object Store at time t (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python dictionary elements)
  • Expression Stack at time t = [ ]

  then Expression Stack at time (t + 1) = [ [ Python dictionary elements, [ ] ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python dictionary elements)
  • Expression Stack at time t = [ ]

  then the line at time (t + 1) = i

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python dictionary elements)
  • Expression Stack at time t = [ ]

  then the tab at time (t + 1) = j

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python dictionary elements)
  • Expression Stack at time t = [ ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python dictionary elements)
  • Expression Stack at time t = [ ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python dictionary elements)
  • Expression Stack at time t = [ ]

  then Value Stack at time (t + 1) = [ [ ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python dictionary elements)
  • Expression Stack at time t = [ ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ function call with name: "__getitem__" and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ [ a, [ Python reference idx, [ ] ] ], [ next_level, other_levels ] ]
  • the element at index idx of stack (Python Object Store at time t) = Python dictionary entries

  then Value Stack at time (t + 1) = [ [ value at a in map entries, next_level ], other_levels ]

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ function call with name: "__setitem__" and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ [ value, [ key, [ Python reference idx, [ ] ] ] ], [ next_level, other_levels ] ]
  • the element at index idx of stack (Python Object Store at time t) = Python dictionary entries

  then Python Object Store at time (t + 1) = result of storing (Python dictionary (result of storing value at key: key in map: entries)) at index idx of stack (Python Object Store at time t)

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ function call with name: "__setitem__" and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ [ value, [ key, [ Python reference idx, [ ] ] ] ], [ next_level, other_levels ] ]
  • the element at index idx of stack (Python Object Store at time t) = Python dictionary entries

  then Value Stack at time (t + 1) = [ [ None, next_level ], other_levels ]

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ function call with name: "__setitem__" and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ [ value, [ key, [ Python reference idx, [ ] ] ] ], [ next_level, other_levels ] ]
  • the element at index idx of stack (Python Object Store at time t) = Python list elements

  then Python Object Store at time (t + 1) = result of storing (Python list (result of storing value at index key of stack elements)) at index idx of stack (Python Object Store at time t)

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ function call with name: "__setitem__" and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ [ value, [ key, [ Python reference idx, [ ] ] ] ], [ next_level, other_levels ] ]
  • the element at index idx of stack (Python Object Store at time t) = Python list elements

  then Value Stack at time (t + 1) = [ [ None, next_level ], other_levels ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = function call with name: "__setitem__" and arguments: args
  • Expression Stack at time t = [ ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__setitem__" and arguments: args, ys ], rest ] ], then Expression Stack at time (t + 1) = [ ys, rest ] (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__setitem__" and arguments: args, ys ], rest ] ], then the line at time (t + 1) = the line at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__setitem__" and arguments: args, ys ], rest ] ], then the tab at time (t + 1) = the tab at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__setitem__" and arguments: args, ys ], rest ] ], then Variables Map at time (t + 1) = Variables Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__setitem__" and arguments: args, ys ], rest ] ], then Control Map at time (t + 1) = Control Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__setitem__" and arguments: args, ys ], rest ] ], then Context Stack at time (t + 1) = Context Stack at time t (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab k = s
  • k < j
  • value at (j - 1) in map (Control Map at time t) = pair ("class", class_name)

  then Expression Stack at time t = [ ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab k = s
  • k < j
  • value at (j - 1) in map (Control Map at time t) = pair ("class", class_name)

  then Expression Stack at time (t + 1) = Expression Stack at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ obj_name.method_name(args), ys ], rest ] ]
  • value at obj_name in map (Variables Map at time t) = Python reference index
  • the element at index index of stack (Python Object Store at time t) = Python object: [ entry "__class_name__": class_name, e_rest ]
  • method parameters where the Class Map is (Class Map at time t), class name is class_name, and method name is method_name = params
  • Parameters List at time t = None
  • Value Stack at time t = [ values, v_stack ]

  then Parameters List at time (t + 1) = params

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ obj_name.method_name(args), ys ], rest ] ]
  • value at obj_name in map (Variables Map at time t) = Python reference index
  • the element at index index of stack (Python Object Store at time t) = Python object: [ entry "__class_name__": class_name, e_rest ]
  • method parameters where the Class Map is (Class Map at time t), class name is class_name, and method name is method_name = params
  • Parameters List at time t = None
  • Value Stack at time t = [ values, v_stack ]

  then Value Stack at time (t + 1) = v_stack

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ obj_name.method_name(args), ys ], rest ] ]
  • value at obj_name in map (Variables Map at time t) = Python reference index
  • the element at index index of stack (Python Object Store at time t) = Python object: [ entry "__class_name__": class_name, e_rest ]
  • method parameters where the Class Map is (Class Map at time t), class name is class_name, and method name is method_name = params
  • Parameters List at time t = None
  • Value Stack at time t = [ values, v_stack ]

  then Function Variables Map at time (t + 1) = [ ]

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ obj_name.method_name(args), ys ], rest ] ]
  • value at obj_name in map (Variables Map at time t) = Python reference index
  • the element at index index of stack (Python Object Store at time t) = Python object: [ entry "__class_name__": class_name, e_rest ]
  • method parameters where the Class Map is (Class Map at time t), class name is class_name, and method name is method_name = params
  • Parameters List at time t = None
  • Value Stack at time t = [ values, v_stack ]

  then Argument Values at time (t + 1) = [ Python reference index, reverse of values ]

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ obj_name.method_name(args), ys ], rest ] ]
  • value at obj_name in map (Variables Map at time t) = Python reference index
  • the element at index index of stack (Python Object Store at time t) = Python object: [ entry "__class_name__": class_name, e_rest ]
  • method parameters where the Class Map is (Class Map at time t), class name is class_name, and method name is method_name = params
  • Parameters List at time t = None
  • Value Stack at time t = [ values, v_stack ]

  then Expression Stack at time (t + 1) = Expression Stack at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ obj_name.method_name(args), ys ], rest ] ]
  • value at obj_name in map (Variables Map at time t) = Python reference index
  • the element at index index of stack (Python Object Store at time t) = Python object: [ entry "__class_name__": class_name, e_rest ]
  • method parameters where the Class Map is (Class Map at time t), class name is class_name, and method name is method_name = params
  • Parameters List at time t = None
  • Value Stack at time t = [ values, v_stack ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ obj_name.method_name(args), ys ], rest ] ]
  • value at obj_name in map (Variables Map at time t) = Python reference index
  • the element at index index of stack (Python Object Store at time t) = Python object: [ entry "__class_name__": class_name, e_rest ]
  • method parameters where the Class Map is (Class Map at time t), class name is class_name, and method name is method_name = params
  • Parameters List at time t = None
  • Value Stack at time t = [ values, v_stack ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ obj_name.method_name(args), ys ], rest ] ]
  • value at obj_name in map (Variables Map at time t) = Python reference index
  • the element at index index of stack (Python Object Store at time t) = Python object: [ entry "__class_name__": class_name, e_rest ]
  • method parameters where the Class Map is (Class Map at time t), class name is class_name, and method name is method_name = params
  • Parameters List at time t = None
  • Value Stack at time t = [ values, v_stack ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ obj_name.method_name(args), ys ], rest ] ]
  • value at obj_name in map (Variables Map at time t) = Python reference index
  • the element at index index of stack (Python Object Store at time t) = Python object: [ entry "__class_name__": class_name, e_rest ]
  • method parameters where the Class Map is (Class Map at time t), class name is class_name, and method name is method_name = params
  • Parameters List at time t = None
  • Value Stack at time t = [ values, v_stack ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ obj_name.method_name(args), ys ], rest ] ]
  • value at obj_name in map (Variables Map at time t) = Python reference index
  • the element at index index of stack (Python Object Store at time t) = Python object: [ entry "__class_name__": class_name, e_rest ]
  • method parameters where the Class Map is (Class Map at time t), class name is class_name, and method name is method_name = params
  • Parameters List at time t = None
  • Value Stack at time t = [ values, v_stack ]

  then the line at time (t + 1) = the line at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ obj_name.method_name(args), ys ], rest ] ]
  • value at obj_name in map (Variables Map at time t) = Python reference index
  • the element at index index of stack (Python Object Store at time t) = Python object: [ entry "__class_name__": class_name, e_rest ]
  • method parameters where the Class Map is (Class Map at time t), class name is class_name, and method name is method_name = params
  • Parameters List at time t = None
  • Value Stack at time t = [ values, v_stack ]

  then the tab at time (t + 1) = the tab at time t

  (link)
• if the following are true:
  • Parameters List at time t = [ ]
  • Expression Stack at time t = [ [ ], [ [ obj_name.method_name(args), ys ], rest ] ]
  • value at obj_name in map (Variables Map at time t) = Python reference index
  • the element at index index of stack (Python Object Store at time t) = Python object: [ entry "__class_name__": class_name, e_rest ]
  • line number of method method_name of class class_name in (Class Map at time t) = line

  then the line at time (t + 1) = line + 1

  (link)
• if the following are true:
  • Parameters List at time t = [ ]
  • Expression Stack at time t = [ [ ], [ [ obj_name.method_name(args), ys ], rest ] ]
  • value at obj_name in map (Variables Map at time t) = Python reference index
  • the element at index index of stack (Python Object Store at time t) = Python object: [ entry "__class_name__": class_name, e_rest ]
  • line number of method method_name of class class_name in (Class Map at time t) = line

  then the tab at time (t + 1) = 2

  (link)
• if the following are true:
  • Parameters List at time t = [ ]
  • Expression Stack at time t = [ [ ], [ [ obj_name.method_name(args), ys ], rest ] ]
  • value at obj_name in map (Variables Map at time t) = Python reference index
  • the element at index index of stack (Python Object Store at time t) = Python object: [ entry "__class_name__": class_name, e_rest ]
  • line number of method method_name of class class_name in (Class Map at time t) = line

  then Control Map at time (t + 1) = [ entry 0: (pair ("class", class_name)), [ entry 1: (pair ("method", method_name)), [ ] ] ]

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ name.method(args), ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then Value Stack at time (t + 1) = [ [ r, next_level ], other_levels ]

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ name.method(args), ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then Expression Stack at time (t + 1) = [ ys, rest ]

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ name.method(args), ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then Return Value at time (t + 1) = [ ]

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ name.method(args), ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then Parameters List at time (t + 1) = None

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ name.method(args), ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ name.method(args), ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ name.method(args), ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ name.method(args), ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ name.method(args), ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then the line at time (t + 1) = the line at time t

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ name.method(args), ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then the tab at time (t + 1) = the tab at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj.mn(args)
  • Expression Stack at time t = [ [ ], [ ] ]

  then the line at time (t + 1) = i + 1

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj.mn(args)
  • Expression Stack at time t = [ [ ], [ ] ]

  then Expression Stack at time (t + 1) = [ ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj.mn(args)
  • Expression Stack at time t = [ [ ], [ ] ]

  then the tab at time (t + 1) = the tab at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj.mn(args)
  • Expression Stack at time t = [ [ ], [ ] ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj.mn(args)
  • Expression Stack at time t = [ [ ], [ ] ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj.mn(args)
  • Expression Stack at time t = [ [ ], [ ] ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj.mn(args)
  • Expression Stack at time t = [ [ ], [ ] ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (obj_name.method_name(args))
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ ] ]

  then Variables Map at time (t + 1) = result of storing value at key: x in map: (Variables Map at time t)

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (obj_name.method_name(args))
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ ] ]

  then the line at time (t + 1) = i + 1

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (obj_name.method_name(args))
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ ] ]

  then the tab at time (t + 1) = the tab at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (obj_name.method_name(args))
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ ] ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (obj_name.method_name(args))
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ ] ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (obj_name.method_name(args))
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ ] ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python constructor with name: name and arguments: args)
  • Expression Stack at time t = [ ]

  then Expression Stack at time (t + 1) = [ [ Python constructor with name: name and arguments: args, [ ] ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python constructor with name: name and arguments: args)
  • Expression Stack at time t = [ ]

  then Value Stack at time (t + 1) = [ [ ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python constructor with name: name and arguments: args)
  • Expression Stack at time t = [ ]

  then the line at time (t + 1) = i

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python constructor with name: name and arguments: args)
  • Expression Stack at time t = [ ]

  then the tab at time (t + 1) = j

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python constructor with name: name and arguments: args)
  • Expression Stack at time t = [ ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python constructor with name: name and arguments: args)
  • Expression Stack at time t = [ ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python constructor with name: name and arguments: args)
  • Expression Stack at time t = [ ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python constructor with name: name and arguments: args)
  • Expression Stack at time t = [ ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if Expression Stack at time t = [ [ Python constructor with name: class_name and arguments: args, ys ], rest ], then Value Stack at time (t + 1) = [ [ ], Value Stack at time t ] (link)
• if Expression Stack at time t = [ [ Python constructor with name: class_name and arguments: args, ys ], rest ], then Expression Stack at time (t + 1) = [ args, [ [ Python constructor with name: class_name and arguments: args, ys ], rest ] ] (link)
• if Expression Stack at time t = [ [ Python constructor with name: class_name and arguments: args, ys ], rest ], then Parameters List at time (t + 1) = None (link)
• if Expression Stack at time t = [ [ Python constructor with name: class_name and arguments: args, ys ], rest ], then the line at time (t + 1) = the line at time t (link)
• if Expression Stack at time t = [ [ Python constructor with name: class_name and arguments: args, ys ], rest ], then the tab at time (t + 1) = the tab at time t (link)
• if Expression Stack at time t = [ [ Python constructor with name: class_name and arguments: args, ys ], rest ], then Variables Map at time (t + 1) = Variables Map at time t (link)
• if Expression Stack at time t = [ [ Python constructor with name: class_name and arguments: args, ys ], rest ], then Control Map at time (t + 1) = Control Map at time t (link)
• if Expression Stack at time t = [ [ Python constructor with name: class_name and arguments: args, ys ], rest ], then Python Object Store at time (t + 1) = Python Object Store at time t (link)
• if Expression Stack at time t = [ [ Python constructor with name: class_name and arguments: args, ys ], rest ], then Context Stack at time (t + 1) = Context Stack at time t (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: class_name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ evaluated, stack ]
  • method parameters where the Class Map is (Class Map at time t), class name is class_name, and method name is "__init__" = params
  • Parameters List at time t = None

  then Value Stack at time (t + 1) = stack

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: class_name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ evaluated, stack ]
  • method parameters where the Class Map is (Class Map at time t), class name is class_name, and method name is "__init__" = params
  • Parameters List at time t = None

  then Parameters List at time (t + 1) = params

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: class_name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ evaluated, stack ]
  • method parameters where the Class Map is (Class Map at time t), class name is class_name, and method name is "__init__" = params
  • Parameters List at time t = None

  then Function Variables Map at time (t + 1) = [ ]

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: class_name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ evaluated, stack ]
  • method parameters where the Class Map is (Class Map at time t), class name is class_name, and method name is "__init__" = params
  • Parameters List at time t = None

  then Argument Values at time (t + 1) = reverse of evaluated

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: class_name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ evaluated, stack ]
  • method parameters where the Class Map is (Class Map at time t), class name is class_name, and method name is "__init__" = params
  • Parameters List at time t = None

  then Expression Stack at time (t + 1) = Expression Stack at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: class_name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ evaluated, stack ]
  • method parameters where the Class Map is (Class Map at time t), class name is class_name, and method name is "__init__" = params
  • Parameters List at time t = None

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: class_name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ evaluated, stack ]
  • method parameters where the Class Map is (Class Map at time t), class name is class_name, and method name is "__init__" = params
  • Parameters List at time t = None

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: class_name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ evaluated, stack ]
  • method parameters where the Class Map is (Class Map at time t), class name is class_name, and method name is "__init__" = params
  • Parameters List at time t = None

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: class_name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ evaluated, stack ]
  • method parameters where the Class Map is (Class Map at time t), class name is class_name, and method name is "__init__" = params
  • Parameters List at time t = None

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: class_name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ evaluated, stack ]
  • method parameters where the Class Map is (Class Map at time t), class name is class_name, and method name is "__init__" = params
  • Parameters List at time t = None

  then the line at time (t + 1) = the line at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: class_name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ evaluated, stack ]
  • method parameters where the Class Map is (Class Map at time t), class name is class_name, and method name is "__init__" = params
  • Parameters List at time t = None

  then the tab at time (t + 1) = the tab at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: class_name and arguments: args, ys ], rest ] ]
  • Function Variables Map at time t = [ ]
  • Parameters List at time t = [ self, p_rest ]

  then Function Variables Map at time (t + 1) = [ entry self: (Python reference (length of stack (Python Object Store at time t))), [ ] ]

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: class_name and arguments: args, ys ], rest ] ]
  • Function Variables Map at time t = [ ]
  • Parameters List at time t = [ self, p_rest ]

  then Python Object Store at time (t + 1) = result of appending (Python object: [ entry "__class_name__": class_name, [ ] ]) to (Python Object Store at time t)

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: class_name and arguments: args, ys ], rest ] ]
  • Function Variables Map at time t = [ ]
  • Parameters List at time t = [ self, p_rest ]

  then Parameters List at time (t + 1) = p_rest

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: class_name and arguments: args, ys ], rest ] ]
  • Function Variables Map at time t = [ ]
  • Parameters List at time t = [ self, p_rest ]

  then Argument Values at time (t + 1) = Argument Values at time t

  (link)
• if the following are true:
  • Parameters List at time t = [ ]
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: class_name and arguments: args, ys ], rest ] ]
  • line number of method "__init__" of class class_name in (Class Map at time t) = line

  then the line at time (t + 1) = line + 1

  (link)
• if the following are true:
  • Parameters List at time t = [ ]
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: class_name and arguments: args, ys ], rest ] ]
  • line number of method "__init__" of class class_name in (Class Map at time t) = line

  then the tab at time (t + 1) = 2

  (link)
• if the following are true:
  • Parameters List at time t = [ ]
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: class_name and arguments: args, ys ], rest ] ]
  • line number of method "__init__" of class class_name in (Class Map at time t) = line

  then Control Map at time (t + 1) = [ entry 0: (pair ("class", class_name)), [ entry 1: (pair ("method", "__init__")), [ ] ] ]

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: clss_name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then Value Stack at time (t + 1) = [ [ r, next_level ], other_levels ]

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: clss_name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then Expression Stack at time (t + 1) = [ ys, rest ]

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: clss_name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then Return Value at time (t + 1) = [ ]

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: clss_name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then Parameters List at time (t + 1) = None

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: clss_name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: clss_name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: clss_name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: clss_name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: clss_name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then the line at time (t + 1) = the line at time t

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ Python constructor with name: clss_name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then the tab at time (t + 1) = the tab at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python constructor with name: class_name and arguments: args)
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ ] ]

  then Variables Map at time (t + 1) = result of storing value at key: x in map: (Variables Map at time t)

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python constructor with name: class_name and arguments: args)
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ ] ]

  then the line at time (t + 1) = i + 1

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python constructor with name: class_name and arguments: args)
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ ] ]

  then the tab at time (t + 1) = the tab at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python constructor with name: class_name and arguments: args)
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ ] ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python constructor with name: class_name and arguments: args)
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ ] ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (Python constructor with name: class_name and arguments: args)
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ ] ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (obj.attr)
  • Expression Stack at time t = [ ]

  then Expression Stack at time (t + 1) = [ [ obj.attr, [ ] ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (obj.attr)
  • Expression Stack at time t = [ ]

  then Value Stack at time (t + 1) = [ [ ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (obj.attr)
  • Expression Stack at time t = [ ]

  then the line at time (t + 1) = i

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (obj.attr)
  • Expression Stack at time t = [ ]

  then the tab at time (t + 1) = j

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (obj.attr)
  • Expression Stack at time t = [ ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (obj.attr)
  • Expression Stack at time t = [ ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (obj.attr)
  • Expression Stack at time t = [ ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (obj.attr)
  • Expression Stack at time t = [ ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (obj.attr)
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ ] ]

  then Variables Map at time (t + 1) = result of storing value at key: x in map: (Variables Map at time t)

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (obj.attr)
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ ] ]

  then the line at time (t + 1) = i + 1

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (obj.attr)
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ ] ]

  then the tab at time (t + 1) = the tab at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (obj.attr)
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ ] ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (obj.attr)
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ ] ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = assign statement with target x and expression (obj.attr)
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ ] ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if Expression Stack at time t = [ [ obj.attr, ys ], rest ], then Value Stack at time (t + 1) = [ [ ], Value Stack at time t ] (link)
• if Expression Stack at time t = [ [ obj.attr, ys ], rest ], then Expression Stack at time (t + 1) = [ [ obj, [ ] ], [ [ obj.attr, ys ], rest ] ] (link)
• if Expression Stack at time t = [ [ obj.attr, ys ], rest ], then Parameters List at time (t + 1) = None (link)
• if Expression Stack at time t = [ [ obj.attr, ys ], rest ], then the line at time (t + 1) = the line at time t (link)
• if Expression Stack at time t = [ [ obj.attr, ys ], rest ], then the tab at time (t + 1) = the tab at time t (link)
• if Expression Stack at time t = [ [ obj.attr, ys ], rest ], then Variables Map at time (t + 1) = Variables Map at time t (link)
• if Expression Stack at time t = [ [ obj.attr, ys ], rest ], then Control Map at time (t + 1) = Control Map at time t (link)
• if Expression Stack at time t = [ [ obj.attr, ys ], rest ], then Python Object Store at time (t + 1) = Python Object Store at time t (link)
• if Expression Stack at time t = [ [ obj.attr, ys ], rest ], then Context Stack at time (t + 1) = Context Stack at time t (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ obj.attr, ys ], rest ] ]
  • Value Stack at time t = [ [ Python reference index, [ ] ], [ next_level, other_levels ] ]
  • the element at index index of stack (Python Object Store at time t) = Python object: attributes

  then Value Stack at time (t + 1) = [ [ value at attr in map attributes, next_level ], other_levels ]

  (link)
• if Expression Stack at time t = [ [ ], [ [ obj.attr, ys ], rest ] ], then Expression Stack at time (t + 1) = [ ys, rest ] (link)
• if Expression Stack at time t = [ [ ], [ [ obj.attr, ys ], rest ] ], then the line at time (t + 1) = the line at time t (link)
• if Expression Stack at time t = [ [ ], [ [ obj.attr, ys ], rest ] ], then the tab at time (t + 1) = the tab at time t (link)
• if Expression Stack at time t = [ [ ], [ [ obj.attr, ys ], rest ] ], then Variables Map at time (t + 1) = Variables Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ obj.attr, ys ], rest ] ], then Control Map at time (t + 1) = Control Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ obj.attr, ys ], rest ] ], then Python Object Store at time (t + 1) = Python Object Store at time t (link)
• if Expression Stack at time t = [ [ ], [ [ obj.attr, ys ], rest ] ], then Context Stack at time (t + 1) = Context Stack at time t (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj.key = value
  • Expression Stack at time t = [ ]

  then Expression Stack at time (t + 1) = [ [ obj.key = value, [ ] ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj.key = value
  • Expression Stack at time t = [ ]

  then Value Stack at time (t + 1) = [ [ ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj.key = value
  • Expression Stack at time t = [ ]

  then the line at time (t + 1) = i

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj.key = value
  • Expression Stack at time t = [ ]

  then the tab at time (t + 1) = j

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj.key = value
  • Expression Stack at time t = [ ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj.key = value
  • Expression Stack at time t = [ ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj.key = value
  • Expression Stack at time t = [ ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = obj.key = value
  • Expression Stack at time t = [ ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if Expression Stack at time t = [ [ obj.key = value, [ ] ], [ ] ], then Expression Stack at time (t + 1) = [ [ obj, [ value, [ ] ] ], [ [ obj.key = value, ys ], rest ] ] (link)
• if Expression Stack at time t = [ [ obj.key = value, [ ] ], [ ] ], then Value Stack at time (t + 1) = [ [ ], Value Stack at time t ] (link)
• if Expression Stack at time t = [ [ obj.key = value, [ ] ], [ ] ], then Parameters List at time (t + 1) = None (link)
• if Expression Stack at time t = [ [ obj.key = value, [ ] ], [ ] ], then the line at time (t + 1) = the line at time t (link)
• if Expression Stack at time t = [ [ obj.key = value, [ ] ], [ ] ], then the tab at time (t + 1) = the tab at time t (link)
• if Expression Stack at time t = [ [ obj.key = value, [ ] ], [ ] ], then Variables Map at time (t + 1) = Variables Map at time t (link)
• if Expression Stack at time t = [ [ obj.key = value, [ ] ], [ ] ], then Control Map at time (t + 1) = Control Map at time t (link)
• if Expression Stack at time t = [ [ obj.key = value, [ ] ], [ ] ], then Python Object Store at time (t + 1) = Python Object Store at time t (link)
• if Expression Stack at time t = [ [ obj.key = value, [ ] ], [ ] ], then Context Stack at time (t + 1) = Context Stack at time t (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ obj.attribute = val, ys ], rest ] ]
  • Value Stack at time t = [ [ value, [ Python reference idx, [ ] ] ], [ next_level, other_levels ] ]
  • the element at index idx of stack (Python Object Store at time t) = Python object: entries

  then Python Object Store at time (t + 1) = result of storing (Python object: (result of storing value at key: attribute in map: entries)) at index idx of stack (Python Object Store at time t)

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ obj.attribute = val, ys ], rest ] ]
  • Value Stack at time t = [ [ value, [ Python reference idx, [ ] ] ], [ next_level, other_levels ] ]
  • the element at index idx of stack (Python Object Store at time t) = Python object: entries

  then Value Stack at time (t + 1) = [ [ None, next_level ], other_levels ]

  (link)
• if Expression Stack at time t = [ [ ], [ [ obj.attribute = val, ys ], rest ] ], then Expression Stack at time (t + 1) = [ ys, rest ] (link)
• if Expression Stack at time t = [ [ ], [ [ obj.attribute = val, ys ], rest ] ], then the line at time (t + 1) = the line at time t (link)
• if Expression Stack at time t = [ [ ], [ [ obj.attribute = val, ys ], rest ] ], then the tab at time (t + 1) = the tab at time t (link)
• if Expression Stack at time t = [ [ ], [ [ obj.attribute = val, ys ], rest ] ], then Variables Map at time (t + 1) = Variables Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ obj.attribute = val, ys ], rest ] ], then Control Map at time (t + 1) = Control Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ obj.attribute = val, ys ], rest ] ], then Context Stack at time (t + 1) = Context Stack at time t (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = x.y = z
  • Expression Stack at time t = [ [ ], [ ] ]

  then the line at time (t + 1) = i + 1

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = x.y = z
  • Expression Stack at time t = [ [ ], [ ] ]

  then the tab at time (t + 1) = the tab at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = x.y = z
  • Expression Stack at time t = [ [ ], [ ] ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = x.y = z
  • Expression Stack at time t = [ [ ], [ ] ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = x.y = z
  • Expression Stack at time t = [ [ ], [ ] ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = x.y = z
  • Expression Stack at time t = [ [ ], [ ] ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = x.y = z
  • Expression Stack at time t = [ [ ], [ ] ]

  then Class Map at time (t + 1) = Class Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab k = s
  • k < j
  • value at (j - 1) in map (Control Map at time t) = pair ("method", mname)
  • Context Stack at time t = [ program context with variables: varis and expression state: (expression state with expression stack: expr_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]

  then Expression Stack at time (t + 1) = expr_stack

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = for target in iterable:
  • map (Control Map at time t) does not contain a for loop entry at line: i and tab: j
  • Expression Stack at time t = [ ]

  then Expression Stack at time (t + 1) = [ [ iterable, [ ] ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = for target in iterable:
  • map (Control Map at time t) does not contain a for loop entry at line: i and tab: j
  • Expression Stack at time t = [ ]

  then Value Stack at time (t + 1) = [ [ ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = for target in iterable:
  • map (Control Map at time t) does not contain a for loop entry at line: i and tab: j
  • Expression Stack at time t = [ ]

  then the line at time (t + 1) = i

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = for target in iterable:
  • map (Control Map at time t) does not contain a for loop entry at line: i and tab: j
  • Expression Stack at time t = [ ]

  then the tab at time (t + 1) = j

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = for target in iterable:
  • map (Control Map at time t) does not contain a for loop entry at line: i and tab: j
  • Expression Stack at time t = [ ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = for target in iterable:
  • map (Control Map at time t) does not contain a for loop entry at line: i and tab: j
  • Expression Stack at time t = [ ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = for target in iterable:
  • map (Control Map at time t) does not contain a for loop entry at line: i and tab: j
  • Expression Stack at time t = [ ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = for target in iterable:
  • Expression Stack at time t = [ [ ], [ ] ]

  then the line at time (t + 1) = i

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = for target in iterable:
  • Expression Stack at time t = [ [ ], [ ] ]

  then the tab at time (t + 1) = j

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = for target in iterable:
  • Expression Stack at time t = [ [ ], [ ] ]

  then "if" map at time (t + 1) = "if" map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = for target in iterable:
  • Expression Stack at time t = [ [ ], [ ] ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = for target in iterable:
  • Expression Stack at time t = [ [ ], [ ] ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = for target in iterable:
  • Expression Stack at time t = [ [ ], [ ] ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = for target in iterable:
  • Expression Stack at time t = [ [ ], [ ] ]

  then 'while stack' at time (t + 1) = 'while stack' at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = for target in iterable_ex:
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ Python reference index, [ ] ], v_stack ]
  • the element at index index of stack (Python Object Store at time t) = Python list elements

  then Control Map at time (t + 1) = result of storing (trio ("for", i, elements)) at key: j in map: (Control Map at time t)

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = for target in iterable_ex:
  • value at j in map (Control Map at time t) = trio ("for", i, [ elem, rest ])

  then Expression Stack at time (t + 1) = [ ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = for target in iterable_ex:
  • value at j in map (Control Map at time t) = trio ("for", i, [ ])

  then Expression Stack at time (t + 1) = [ ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab k = s
  • k < j
  • value at (j - 1) in map (Control Map at time t) = trio ("for", for_line, iterable)

  then Expression Stack at time (t + 1) = Expression Stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • number of lines = i - 1
  • value at (j - 1) in map (Control Map at time t) = trio ("for", for_line, iterable)

  then Expression Stack at time (t + 1) = Expression Stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab k = s
  • k > j

  then Expression Stack at time (t + 1) = [ ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab k = s
  • k < j
  • value at (j - 1) in map (Control Map at time t) = pair ("while", while_line)

  then Expression Stack at time (t + 1) = [ ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • number of lines = i - 1
  • value at (j - 1) in map (Control Map at time t) = pair ("while", while_line)

  then Expression Stack at time (t + 1) = [ ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab k = s
  • k < j

  then Expression Stack at time (t + 1) = [ ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • number of lines = i - 1
  • value at (j - 1) in map (Control Map at time t) = pair ("if", if_value)

  then Expression Stack at time (t + 1) = [ ]

  (link)
• if "continue" state at t = "continuing", then Expression Stack at time (t + 1) = [ ] (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = c
  • c is constant
  • Expression Stack at time t = [ ]

  then Expression Stack at time (t + 1) = [ [ c, [ ] ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = c
  • c is constant
  • Expression Stack at time t = [ ]

  then Value Stack at time (t + 1) = [ [ ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = c
  • c is constant
  • Expression Stack at time t = [ ]

  then the line at time (t + 1) = i

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = c
  • c is constant
  • Expression Stack at time t = [ ]

  then the tab at time (t + 1) = j

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = x
  • c is a variable
  • Expression Stack at time t = [ ]

  then Expression Stack at time (t + 1) = [ [ x, [ ] ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = x
  • c is a variable
  • Expression Stack at time t = [ ]

  then Value Stack at time (t + 1) = [ [ ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = x
  • c is a variable
  • Expression Stack at time t = [ ]

  then the line at time (t + 1) = i

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = x
  • c is a variable
  • Expression Stack at time t = [ ]

  then the tab at time (t + 1) = j

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = function call with name: name and arguments: args
  • Expression Stack at time t = [ ]

  then Expression Stack at time (t + 1) = [ [ function call with name: name and arguments: args, [ ] ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = function call with name: name and arguments: args
  • Expression Stack at time t = [ ]

  then Value Stack at time (t + 1) = [ [ ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = function call with name: name and arguments: args
  • Expression Stack at time t = [ ]

  then the line at time (t + 1) = i

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = function call with name: name and arguments: args
  • Expression Stack at time t = [ ]

  then the tab at time (t + 1) = j

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = function call with name: name and arguments: args
  • Expression Stack at time t = [ ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = function call with name: name and arguments: args
  • Expression Stack at time t = [ ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = function call with name: name and arguments: args
  • Expression Stack at time t = [ ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = function call with name: name and arguments: args
  • Expression Stack at time t = [ ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ x, ys ], rest ]
  • Value Stack at time t = [ values, v_rest ]
  • x is constant

  then Expression Stack at time (t + 1) = [ ys, rest ]

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ x, ys ], rest ]
  • Value Stack at time t = [ values, v_rest ]
  • x is constant

  then Value Stack at time (t + 1) = [ [ x, values ], v_rest ]

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ x, ys ], rest ]
  • Value Stack at time t = [ values, v_rest ]
  • x is constant

  then Parameters List at time (t + 1) = None

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ x, ys ], rest ]
  • Value Stack at time t = [ values, v_rest ]
  • x is constant

  then the line at time (t + 1) = the line at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ x, ys ], rest ]
  • Value Stack at time t = [ values, v_rest ]
  • x is constant

  then the tab at time (t + 1) = the tab at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ x, ys ], rest ]
  • Value Stack at time t = [ values, v_rest ]
  • x is constant

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ x, ys ], rest ]
  • Value Stack at time t = [ values, v_rest ]
  • x is constant

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ x, ys ], rest ]
  • Value Stack at time t = [ values, v_rest ]
  • x is constant

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ x, ys ], rest ]
  • Value Stack at time t = [ values, v_rest ]
  • x is constant

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ x, ys ], rest ]
  • Value Stack at time t = [ values, v_rest ]
  • x is a variable

  then Expression Stack at time (t + 1) = [ ys, rest ]

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ x, ys ], rest ]
  • Value Stack at time t = [ values, v_rest ]
  • x is a variable

  then Value Stack at time (t + 1) = [ [ value at x in map (Variables Map at time t), values ], v_rest ]

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ x, ys ], rest ]
  • Value Stack at time t = [ values, v_rest ]
  • x is a variable

  then Parameters List at time (t + 1) = None

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ x, ys ], rest ]
  • Value Stack at time t = [ values, v_rest ]
  • x is a variable

  then the line at time (t + 1) = the line at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ x, ys ], rest ]
  • Value Stack at time t = [ values, v_rest ]
  • x is a variable

  then the tab at time (t + 1) = the tab at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ x, ys ], rest ]
  • Value Stack at time t = [ values, v_rest ]
  • x is a variable

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ x, ys ], rest ]
  • Value Stack at time t = [ values, v_rest ]
  • x is a variable

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ x, ys ], rest ]
  • Value Stack at time t = [ values, v_rest ]
  • x is a variable

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ x, ys ], rest ]
  • Value Stack at time t = [ values, v_rest ]
  • x is a variable

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if Expression Stack at time t = [ [ function call with name: name and arguments: args, ys ], rest ], then Expression Stack at time (t + 1) = [ args, [ [ function call with name: name and arguments: args, ys ], rest ] ] (link)
• if Expression Stack at time t = [ [ function call with name: name and arguments: args, ys ], rest ], then Value Stack at time (t + 1) = [ [ ], Value Stack at time t ] (link)
• if Expression Stack at time t = [ [ function call with name: name and arguments: args, ys ], rest ], then Parameters List at time (t + 1) = None (link)
• if Expression Stack at time t = [ [ function call with name: name and arguments: args, ys ], rest ], then the line at time (t + 1) = the line at time t (link)
• if Expression Stack at time t = [ [ function call with name: name and arguments: args, ys ], rest ], then the tab at time (t + 1) = the tab at time t (link)
• if Expression Stack at time t = [ [ function call with name: name and arguments: args, ys ], rest ], then Variables Map at time (t + 1) = Variables Map at time t (link)
• if Expression Stack at time t = [ [ function call with name: name and arguments: args, ys ], rest ], then Control Map at time (t + 1) = Control Map at time t (link)
• if Expression Stack at time t = [ [ function call with name: name and arguments: args, ys ], rest ], then Python Object Store at time (t + 1) = Python Object Store at time t (link)
• if Expression Stack at time t = [ [ function call with name: name and arguments: args, ys ], rest ], then Context Stack at time (t + 1) = Context Stack at time t (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ function call with name: "__add__" and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ [ a, [ b, [ ] ] ], [ next_level, other_levels ] ]

  then Value Stack at time (t + 1) = [ [ b + a, next_level ], other_levels ]

  (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__add__" and arguments: args, ys ], rest ] ], then Expression Stack at time (t + 1) = [ ys, rest ] (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__add__" and arguments: args, ys ], rest ] ], then the line at time (t + 1) = the line at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__add__" and arguments: args, ys ], rest ] ], then the tab at time (t + 1) = the tab at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__add__" and arguments: args, ys ], rest ] ], then Variables Map at time (t + 1) = Variables Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__add__" and arguments: args, ys ], rest ] ], then Control Map at time (t + 1) = Control Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__add__" and arguments: args, ys ], rest ] ], then Python Object Store at time (t + 1) = Python Object Store at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__add__" and arguments: args, ys ], rest ] ], then Context Stack at time (t + 1) = Context Stack at time t (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ function call with name: "__mul__" and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ [ a, [ b, [ ] ] ], [ next_level, other_levels ] ]

  then Value Stack at time (t + 1) = [ [ b ⋅ a, next_level ], other_levels ]

  (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__mul__" and arguments: args, ys ], rest ] ], then Expression Stack at time (t + 1) = [ ys, rest ] (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__mul__" and arguments: args, ys ], rest ] ], then the line at time (t + 1) = the line at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__mul__" and arguments: args, ys ], rest ] ], then the tab at time (t + 1) = the tab at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__mul__" and arguments: args, ys ], rest ] ], then Variables Map at time (t + 1) = Variables Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__mul__" and arguments: args, ys ], rest ] ], then Control Map at time (t + 1) = Control Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__mul__" and arguments: args, ys ], rest ] ], then Python Object Store at time (t + 1) = Python Object Store at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__mul__" and arguments: args, ys ], rest ] ], then Context Stack at time (t + 1) = Context Stack at time t (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ function call with name: "__eq__" and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ [ a, [ b, [ ] ] ], [ next_level, other_levels ] ]

  then Value Stack at time (t + 1) = [ [ b = a, next_level ], other_levels ]

  (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__eq__" and arguments: args, ys ], rest ] ], then Expression Stack at time (t + 1) = [ ys, rest ] (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__eq__" and arguments: args, ys ], rest ] ], then the line at time (t + 1) = the line at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__eq__" and arguments: args, ys ], rest ] ], then the tab at time (t + 1) = the tab at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__eq__" and arguments: args, ys ], rest ] ], then Variables Map at time (t + 1) = Variables Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__eq__" and arguments: args, ys ], rest ] ], then Control Map at time (t + 1) = Control Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__eq__" and arguments: args, ys ], rest ] ], then Python Object Store at time (t + 1) = Python Object Store at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__eq__" and arguments: args, ys ], rest ] ], then Context Stack at time (t + 1) = Context Stack at time t (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ function call with name: "__lt__" and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ [ a, [ b, [ ] ] ], [ next_level, other_levels ] ]

  then Value Stack at time (t + 1) = [ [ b < a, next_level ], other_levels ]

  (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__lt__" and arguments: args, ys ], rest ] ], then Expression Stack at time (t + 1) = [ ys, rest ] (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__lt__" and arguments: args, ys ], rest ] ], then the line at time (t + 1) = the line at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__lt__" and arguments: args, ys ], rest ] ], then the tab at time (t + 1) = the tab at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__lt__" and arguments: args, ys ], rest ] ], then Variables Map at time (t + 1) = Variables Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__lt__" and arguments: args, ys ], rest ] ], then Control Map at time (t + 1) = Control Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__lt__" and arguments: args, ys ], rest ] ], then Python Object Store at time (t + 1) = Python Object Store at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__lt__" and arguments: args, ys ], rest ] ], then Context Stack at time (t + 1) = Context Stack at time t (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ function call with name: "__gt__" and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ [ a, [ b, [ ] ] ], [ next_level, other_levels ] ]

  then Value Stack at time (t + 1) = [ [ b > a, next_level ], other_levels ]

  (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__gt__" and arguments: args, ys ], rest ] ], then Expression Stack at time (t + 1) = [ ys, rest ] (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__gt__" and arguments: args, ys ], rest ] ], then the line at time (t + 1) = the line at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__gt__" and arguments: args, ys ], rest ] ], then the tab at time (t + 1) = the tab at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__gt__" and arguments: args, ys ], rest ] ], then Variables Map at time (t + 1) = Variables Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__gt__" and arguments: args, ys ], rest ] ], then Control Map at time (t + 1) = Control Map at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__gt__" and arguments: args, ys ], rest ] ], then Python Object Store at time (t + 1) = Python Object Store at time t (link)
• if Expression Stack at time t = [ [ ], [ [ function call with name: "__gt__" and arguments: args, ys ], rest ] ], then Context Stack at time (t + 1) = Context Stack at time t (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ function call with name: name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ values, v_rest ]
  • there is a function named name with parameters params at line line
  • Parameters List at time t = None

  then Parameters List at time (t + 1) = params

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ function call with name: name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ values, v_rest ]
  • there is a function named name with parameters params at line line
  • Parameters List at time t = None

  then Argument Values at time (t + 1) = reverse of values

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ function call with name: name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ values, v_rest ]
  • there is a function named name with parameters params at line line
  • Parameters List at time t = None

  then Function Variables Map at time (t + 1) = [ ]

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ function call with name: name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ values, v_rest ]
  • there is a function named name with parameters params at line line
  • Parameters List at time t = None

  then Value Stack at time (t + 1) = v_rest

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ function call with name: name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ values, v_rest ]
  • there is a function named name with parameters params at line line
  • Parameters List at time t = None

  then Expression Stack at time (t + 1) = Expression Stack at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ function call with name: name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ values, v_rest ]
  • there is a function named name with parameters params at line line
  • Parameters List at time t = None

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ function call with name: name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ values, v_rest ]
  • there is a function named name with parameters params at line line
  • Parameters List at time t = None

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ function call with name: name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ values, v_rest ]
  • there is a function named name with parameters params at line line
  • Parameters List at time t = None

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ function call with name: name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ values, v_rest ]
  • there is a function named name with parameters params at line line
  • Parameters List at time t = None

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ function call with name: name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ values, v_rest ]
  • there is a function named name with parameters params at line line
  • Parameters List at time t = None

  then the line at time (t + 1) = the line at time t

  (link)
• if the following are true:
  • Expression Stack at time t = [ [ ], [ [ function call with name: name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ values, v_rest ]
  • there is a function named name with parameters params at line line
  • Parameters List at time t = None

  then the tab at time (t + 1) = the tab at time t

  (link)
• if Parameters List at time t = [ var, frest ], then Expression Stack at time (t + 1) = Expression Stack at time t (link)
• if Parameters List at time t = [ ], then Context Stack at time (t + 1) = [ program context with variables: (Variables Map at time t) and expression state: (expression state with expression stack: (Expression Stack at time t) values: (Value Stack at time t) line: (the line at time t) tab: (the tab at time t)) and control map: (Control Map at time t), Context Stack at time t ] (link)
• if Parameters List at time t = [ ], then Expression Stack at time (t + 1) = [ ] (link)
• if the following are true:
  • Parameters List at time t = [ ]
  • Expression Stack at time t = [ [ ], [ [ function call with name: name and arguments: args, ys ], rest ] ]
  • there is a function named name with parameters params at line line

  then the line at time (t + 1) = line + 1

  (link)
• if the following are true:
  • Parameters List at time t = [ ]
  • Expression Stack at time t = [ [ ], [ [ function call with name: name and arguments: args, ys ], rest ] ]
  • there is a function named name with parameters params at line line

  then Control Map at time (t + 1) = [ entry 0: (pair ("function", name)), [ ] ]

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ function call with name: name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then Value Stack at time (t + 1) = [ [ r, next_level ], other_levels ]

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ function call with name: name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then Expression Stack at time (t + 1) = [ ys, rest ]

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ function call with name: name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then Return Value at time (t + 1) = [ ]

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ function call with name: name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then Parameters List at time (t + 1) = None

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ function call with name: name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ function call with name: name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ function call with name: name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ function call with name: name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ function call with name: name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then the line at time (t + 1) = the line at time t

  (link)
• if the following are true:
  • Return Value at time t = [ r, [ ] ]
  • Expression Stack at time t = [ [ ], [ [ function call with name: name and arguments: args, ys ], rest ] ]
  • Value Stack at time t = [ next_level, other_levels ]

  then the tab at time (t + 1) = the tab at time t

  (link)
• if Expression Stack at time t = [ [ ], [ ] ], then Expression Stack at time (t + 1) = [ ] (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = target = expr
  • Expression Stack at time t = [ ]

  then Expression Stack at time (t + 1) = [ [ expr, [ ] ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = target = expr
  • Expression Stack at time t = [ ]

  then Value Stack at time (t + 1) = [ [ ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = target = expr
  • Expression Stack at time t = [ ]

  then the line at time (t + 1) = i

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = target = expr
  • Expression Stack at time t = [ ]

  then the tab at time (t + 1) = j

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = target = expr
  • Expression Stack at time t = [ ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = target = expr
  • Expression Stack at time t = [ ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = target = expr
  • Expression Stack at time t = [ ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = target = expr
  • Expression Stack at time t = [ ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = target = expr
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ ] ]

  then Variables Map at time (t + 1) = result of storing value at key: target in map: (Variables Map at time t)

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = target = expr
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ ] ]

  then the line at time (t + 1) = i + 1

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = target = expr
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ ] ]

  then the tab at time (t + 1) = the tab at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = target = expr
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ ] ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = target = expr
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ ] ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = target = expr
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ ] ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = if expr:
  • Expression Stack at time t = [ ]

  then Expression Stack at time (t + 1) = [ [ expr, [ ] ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = if expr:
  • Expression Stack at time t = [ ]

  then Value Stack at time (t + 1) = [ [ ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = if expr:
  • Expression Stack at time t = [ ]

  then the line at time (t + 1) = i

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = if expr:
  • Expression Stack at time t = [ ]

  then the tab at time (t + 1) = j

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = if expr:
  • Expression Stack at time t = [ ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = if expr:
  • Expression Stack at time t = [ ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = if expr:
  • Expression Stack at time t = [ ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = if expr:
  • Expression Stack at time t = [ ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = if expr:
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ True, [ ] ], [ ] ]

  then the line at time (t + 1) = i + 1

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = if expr:
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ True, [ ] ], [ ] ]

  then the tab at time (t + 1) = j + 1

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = if expr:
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ True, [ ] ], [ ] ]

  then Control Map at time (t + 1) = result of storing (pair ("if", True)) at key: j in map: (Control Map at time t)

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = if expr:
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ False, [ ] ], [ ] ]

  then the line at time (t + 1) = i + 1

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = if expr:
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ False, [ ] ], [ ] ]

  then the tab at time (t + 1) = j

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = if expr:
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ False, [ ] ], [ ] ]

  then Control Map at time (t + 1) = result of storing (pair ("if", False)) at key: j in map: (Control Map at time t)

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = if expr:
  • Expression Stack at time t = [ [ ], [ ] ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = if expr:
  • Expression Stack at time t = [ [ ], [ ] ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = if expr:
  • Expression Stack at time t = [ [ ], [ ] ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = if expr:
  • Expression Stack at time t = [ [ ], [ ] ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif test:
  • Expression Stack at time t = [ ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif test:
  • Expression Stack at time t = [ ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif test:
  • Expression Stack at time t = [ ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif test:
  • Expression Stack at time t = [ ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif test:
  • value at j in map (Control Map at time t) = pair ("if", False)
  • Expression Stack at time t = [ ]

  then Expression Stack at time (t + 1) = [ [ expr, [ ] ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif test:
  • value at j in map (Control Map at time t) = pair ("if", False)
  • Expression Stack at time t = [ ]

  then Value Stack at time (t + 1) = [ [ ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif test:
  • value at j in map (Control Map at time t) = pair ("if", False)
  • Expression Stack at time t = [ ]

  then the line at time (t + 1) = i

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif test:
  • value at j in map (Control Map at time t) = pair ("if", False)
  • Expression Stack at time t = [ ]

  then the tab at time (t + 1) = j

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif test:
  • value at j in map (Control Map at time t) = pair ("if", False)
  • Expression Stack at time t = [ ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif test:
  • value at j in map (Control Map at time t) = pair ("if", False)
  • Expression Stack at time t = [ ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif test:
  • value at j in map (Control Map at time t) = pair ("if", False)
  • Expression Stack at time t = [ ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif test:
  • value at j in map (Control Map at time t) = pair ("if", False)
  • Expression Stack at time t = [ ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif test:
  • value at j in map (Control Map at time t) = pair ("if", True)
  • Expression Stack at time t = [ ]

  then the line at time (t + 1) = i + 1

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif test:
  • value at j in map (Control Map at time t) = pair ("if", True)
  • Expression Stack at time t = [ ]

  then the tab at time (t + 1) = j

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif test:
  • value at j in map (Control Map at time t) = pair ("if", True)
  • Expression Stack at time t = [ ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif test:
  • value at j in map (Control Map at time t) = pair ("if", True)
  • Expression Stack at time t = [ ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif test:
  • value at j in map (Control Map at time t) = pair ("if", True)
  • Expression Stack at time t = [ ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif test:
  • value at j in map (Control Map at time t) = pair ("if", True)
  • Expression Stack at time t = [ ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif test:
  • Expression Stack at time t = [ [ ], [ ] ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif test:
  • Expression Stack at time t = [ [ ], [ ] ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif test:
  • Expression Stack at time t = [ [ ], [ ] ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif expr:
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ True, [ ] ], [ ] ]

  then the line at time (t + 1) = i + 1

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif expr:
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ True, [ ] ], [ ] ]

  then the tab at time (t + 1) = j + 1

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif expr:
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ True, [ ] ], [ ] ]

  then Control Map at time (t + 1) = result of storing (pair ("if", True)) at key: j in map: (Control Map at time t)

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif expr:
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ False, [ ] ], [ ] ]

  then the line at time (t + 1) = i + 1

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif expr:
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ False, [ ] ], [ ] ]

  then the tab at time (t + 1) = j

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = elif expr:
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ False, [ ] ], [ ] ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = else:

  then Expression Stack at time (t + 1) = [ ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = while test:
  • Expression Stack at time t = [ ]

  then Expression Stack at time (t + 1) = [ [ test, [ ] ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = while test:
  • Expression Stack at time t = [ ]

  then the line at time (t + 1) = i

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = while test:
  • Expression Stack at time t = [ ]

  then the tab at time (t + 1) = j

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = while test:
  • Expression Stack at time t = [ ]

  then Value Stack at time (t + 1) = [ [ ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = while test:
  • Expression Stack at time t = [ ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = while test:
  • Expression Stack at time t = [ ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = while test:
  • Expression Stack at time t = [ ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = while test:
  • Expression Stack at time t = [ ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = while test:
  • Expression Stack at time t = [ [ ], [ ] ]

  then the line at time (t + 1) = i + 1

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = while test:
  • Expression Stack at time t = [ [ ], [ ] ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = while test:
  • Expression Stack at time t = [ [ ], [ ] ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = while test:
  • Expression Stack at time t = [ [ ], [ ] ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = "while" statement with condition (function call with name: name and arguments: args)
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ True, [ ] ], [ ] ]

  then the tab at time (t + 1) = j + 1

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = "while" statement with condition (function call with name: name and arguments: args)
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ True, [ ] ], [ ] ]

  then Control Map at time (t + 1) = result of storing (pair ("while", i)) at key: j in map: (Control Map at time t)

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = "while" statement with condition (function call with name: name and arguments: args)
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ False, [ ] ], [ ] ]

  then the tab at time (t + 1) = j

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = "while" statement with condition (function call with name: name and arguments: args)
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ False, [ ] ], [ ] ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = continue

  then Expression Stack at time (t + 1) = [ ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • Expression Stack at time t = [ ]

  then Expression Stack at time (t + 1) = [ [ rex, [ ] ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • Expression Stack at time t = [ ]

  then Value Stack at time (t + 1) = [ [ ], [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • Expression Stack at time t = [ ]

  then the line at time (t + 1) = i

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • Expression Stack at time t = [ ]

  then the tab at time (t + 1) = j

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • Expression Stack at time t = [ ]

  then Variables Map at time (t + 1) = Variables Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • Expression Stack at time t = [ ]

  then Context Stack at time (t + 1) = Context Stack at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • Expression Stack at time t = [ ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • Expression Stack at time t = [ ]

  then Control Map at time (t + 1) = Control Map at time t

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • Context Stack at time t = [ program context with variables: vars and expression state: (expression state with expression stack: expr_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]
  • Expression Stack at time t = [ [ ], [ ] ]

  then Variables Map at time (t + 1) = vars

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • Context Stack at time t = [ program context with variables: vars and expression state: (expression state with expression stack: expr_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]
  • Expression Stack at time t = [ [ ], [ ] ]

  then the line at time (t + 1) = line

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • Context Stack at time t = [ program context with variables: vars and expression state: (expression state with expression stack: expr_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]
  • Expression Stack at time t = [ [ ], [ ] ]

  then the tab at time (t + 1) = tab

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • Context Stack at time t = [ program context with variables: vars and expression state: (expression state with expression stack: expr_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]
  • Expression Stack at time t = [ [ ], [ ] ]

  then Control Map at time (t + 1) = control_map

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • Context Stack at time t = [ program context with variables: vars and expression state: (expression state with expression stack: expr_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]
  • Expression Stack at time t = [ [ ], [ ] ]

  then Context Stack at time (t + 1) = rest

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • Context Stack at time t = [ program context with variables: vars and expression state: (expression state with expression stack: expr_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]
  • Expression Stack at time t = [ [ ], [ ] ]

  then Expression Stack at time (t + 1) = expr_stack

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • Context Stack at time t = [ program context with variables: vars and expression state: (expression state with expression stack: expr_stack values: value_stack line: line tab: tab) and control map: control_map, rest ]
  • Expression Stack at time t = [ [ ], [ ] ]

  then Value Stack at time (t + 1) = value_stack

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • Expression Stack at time t = [ [ ], [ ] ]
  • Value Stack at time t = [ [ value, [ ] ], [ ] ]

  then Return Value at time (t + 1) = [ value, [ ] ]

  (link)
• if the following are true:
  • the line at time t = i
  • the tab at time t = j
  • statement at line i, tab j = return rex
  • Expression Stack at time t = [ [ ], [ ] ]

  then Python Object Store at time (t + 1) = Python Object Store at time t

  (link)

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