embedding-demo.js

// To embed Online Python Tutor visualizations into embedding-demo.html ...

// 1. Run generate_json_trace.py to generate execution traces as JavaScript variables.
//    (WARNING: The following lines are VERY LONG.)

// Run:
//   python generate_json_trace.py --create_jsvar=listSumTrace tests/backend-tests/list_sum.txt
// and copy-and-paste the output line into here:
var listSumTrace = {"code": "def listSum(numbers):\n  if not numbers:\n    return 0\n  else:\n    (f, rest) = numbers\n    return f + listSum(rest)\n\nmyList = (1, (2, (3, None)))\ntotal = listSum(myList)\n", "trace": [{"ordered_globals": [], "stdout": "", "func_name": "<module>", "stack_to_render": [], "globals": {}, "heap": {}, "line": 1, "event": "step_line"}, {"ordered_globals": ["listSum"], "stdout": "", "func_name": "<module>", "stack_to_render": [], "globals": {"listSum": ["REF", 1]}, "heap": {"1": ["FUNCTION", "listSum(numbers)", null]}, "line": 8, "event": "step_line"}, {"ordered_globals": ["listSum", "myList"], "stdout": "", "func_name": "<module>", "stack_to_render": [], "globals": {"myList": ["REF", 2], "listSum": ["REF", 1]}, "heap": {"1": ["FUNCTION", "listSum(numbers)", null], "2": ["TUPLE", 1, ["REF", 3]], "3": ["TUPLE", 2, ["REF", 4]], "4": ["TUPLE", 3, null]}, "line": 9, "event": "step_line"}, {"ordered_globals": ["listSum", "myList"], "stdout": "", "func_name": "listSum", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"numbers": ["REF", 2]}, "is_highlighted": true, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f1", "ordered_varnames": ["numbers"]}], "globals": {"myList": ["REF", 2], "listSum": ["REF", 1]}, "heap": {"1": ["FUNCTION", "listSum(numbers)", null], "2": ["TUPLE", 1, ["REF", 3]], "3": ["TUPLE", 2, ["REF", 4]], "4": ["TUPLE", 3, null]}, "line": 1, "event": "call"}, {"ordered_globals": ["listSum", "myList"], "stdout": "", "func_name": "listSum", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"numbers": ["REF", 2]}, "is_highlighted": true, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f1", "ordered_varnames": ["numbers"]}], "globals": {"myList": ["REF", 2], "listSum": ["REF", 1]}, "heap": {"1": ["FUNCTION", "listSum(numbers)", null], "2": ["TUPLE", 1, ["REF", 3]], "3": ["TUPLE", 2, ["REF", 4]], "4": ["TUPLE", 3, null]}, "line": 2, "event": "step_line"}, {"ordered_globals": ["listSum", "myList"], "stdout": "", "func_name": "listSum", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"numbers": ["REF", 2]}, "is_highlighted": true, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f1", "ordered_varnames": ["numbers"]}], "globals": {"myList": ["REF", 2], "listSum": ["REF", 1]}, "heap": {"1": ["FUNCTION", "listSum(numbers)", null], "2": ["TUPLE", 1, ["REF", 3]], "3": ["TUPLE", 2, ["REF", 4]], "4": ["TUPLE", 3, null]}, "line": 5, "event": "step_line"}, {"ordered_globals": ["listSum", "myList"], "stdout": "", "func_name": "listSum", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"numbers": ["REF", 2], "rest": ["REF", 3], "f": 1}, "is_highlighted": true, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f1", "ordered_varnames": ["numbers", "f", "rest"]}], "globals": {"myList": ["REF", 2], "listSum": ["REF", 1]}, "heap": {"1": ["FUNCTION", "listSum(numbers)", null], "2": ["TUPLE", 1, ["REF", 3]], "3": ["TUPLE", 2, ["REF", 4]], "4": ["TUPLE", 3, null]}, "line": 6, "event": "step_line"}, {"ordered_globals": ["listSum", "myList"], "stdout": "", "func_name": "listSum", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"numbers": ["REF", 2], "rest": ["REF", 3], "f": 1}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f1", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 2, "encoded_locals": {"numbers": ["REF", 3]}, "is_highlighted": true, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f2", "ordered_varnames": ["numbers"]}], "globals": {"myList": ["REF", 2], "listSum": ["REF", 1]}, "heap": {"1": ["FUNCTION", "listSum(numbers)", null], "2": ["TUPLE", 1, ["REF", 3]], "3": ["TUPLE", 2, ["REF", 4]], "4": ["TUPLE", 3, null]}, "line": 1, "event": "call"}, {"ordered_globals": ["listSum", "myList"], "stdout": "", "func_name": "listSum", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"numbers": ["REF", 2], "rest": ["REF", 3], "f": 1}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f1", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 2, "encoded_locals": {"numbers": ["REF", 3]}, "is_highlighted": true, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f2", "ordered_varnames": ["numbers"]}], "globals": {"myList": ["REF", 2], "listSum": ["REF", 1]}, "heap": {"1": ["FUNCTION", "listSum(numbers)", null], "2": ["TUPLE", 1, ["REF", 3]], "3": ["TUPLE", 2, ["REF", 4]], "4": ["TUPLE", 3, null]}, "line": 2, "event": "step_line"}, {"ordered_globals": ["listSum", "myList"], "stdout": "", "func_name": "listSum", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"numbers": ["REF", 2], "rest": ["REF", 3], "f": 1}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f1", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 2, "encoded_locals": {"numbers": ["REF", 3]}, "is_highlighted": true, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f2", "ordered_varnames": ["numbers"]}], "globals": {"myList": ["REF", 2], "listSum": ["REF", 1]}, "heap": {"1": ["FUNCTION", "listSum(numbers)", null], "2": ["TUPLE", 1, ["REF", 3]], "3": ["TUPLE", 2, ["REF", 4]], "4": ["TUPLE", 3, null]}, "line": 5, "event": "step_line"}, {"ordered_globals": ["listSum", "myList"], "stdout": "", "func_name": "listSum", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"numbers": ["REF", 2], "rest": ["REF", 3], "f": 1}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f1", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 2, "encoded_locals": {"numbers": ["REF", 3], "rest": ["REF", 4], "f": 2}, "is_highlighted": true, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f2", "ordered_varnames": ["numbers", "f", "rest"]}], "globals": {"myList": ["REF", 2], "listSum": ["REF", 1]}, "heap": {"1": ["FUNCTION", "listSum(numbers)", null], "2": ["TUPLE", 1, ["REF", 3]], "3": ["TUPLE", 2, ["REF", 4]], "4": ["TUPLE", 3, null]}, "line": 6, "event": "step_line"}, {"ordered_globals": ["listSum", "myList"], "stdout": "", "func_name": "listSum", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"numbers": ["REF", 2], "rest": ["REF", 3], "f": 1}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f1", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 2, "encoded_locals": {"numbers": ["REF", 3], "rest": ["REF", 4], "f": 2}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f2", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 3, "encoded_locals": {"numbers": ["REF", 4]}, "is_highlighted": true, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f3", "ordered_varnames": ["numbers"]}], "globals": {"myList": ["REF", 2], "listSum": ["REF", 1]}, "heap": {"1": ["FUNCTION", "listSum(numbers)", null], "2": ["TUPLE", 1, ["REF", 3]], "3": ["TUPLE", 2, ["REF", 4]], "4": ["TUPLE", 3, null]}, "line": 1, "event": "call"}, {"ordered_globals": ["listSum", "myList"], "stdout": "", "func_name": "listSum", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"numbers": ["REF", 2], "rest": ["REF", 3], "f": 1}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f1", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 2, "encoded_locals": {"numbers": ["REF", 3], "rest": ["REF", 4], "f": 2}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f2", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 3, "encoded_locals": {"numbers": ["REF", 4]}, "is_highlighted": true, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f3", "ordered_varnames": ["numbers"]}], "globals": {"myList": ["REF", 2], "listSum": ["REF", 1]}, "heap": {"1": ["FUNCTION", "listSum(numbers)", null], "2": ["TUPLE", 1, ["REF", 3]], "3": ["TUPLE", 2, ["REF", 4]], "4": ["TUPLE", 3, null]}, "line": 2, "event": "step_line"}, {"ordered_globals": ["listSum", "myList"], "stdout": "", "func_name": "listSum", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"numbers": ["REF", 2], "rest": ["REF", 3], "f": 1}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f1", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 2, "encoded_locals": {"numbers": ["REF", 3], "rest": ["REF", 4], "f": 2}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f2", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 3, "encoded_locals": {"numbers": ["REF", 4]}, "is_highlighted": true, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f3", "ordered_varnames": ["numbers"]}], "globals": {"myList": ["REF", 2], "listSum": ["REF", 1]}, "heap": {"1": ["FUNCTION", "listSum(numbers)", null], "2": ["TUPLE", 1, ["REF", 3]], "3": ["TUPLE", 2, ["REF", 4]], "4": ["TUPLE", 3, null]}, "line": 5, "event": "step_line"}, {"ordered_globals": ["listSum", "myList"], "stdout": "", "func_name": "listSum", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"numbers": ["REF", 2], "rest": ["REF", 3], "f": 1}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f1", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 2, "encoded_locals": {"numbers": ["REF", 3], "rest": ["REF", 4], "f": 2}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f2", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 3, "encoded_locals": {"numbers": ["REF", 4], "rest": null, "f": 3}, "is_highlighted": true, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f3", "ordered_varnames": ["numbers", "f", "rest"]}], "globals": {"myList": ["REF", 2], "listSum": ["REF", 1]}, "heap": {"1": ["FUNCTION", "listSum(numbers)", null], "2": ["TUPLE", 1, ["REF", 3]], "3": ["TUPLE", 2, ["REF", 4]], "4": ["TUPLE", 3, null]}, "line": 6, "event": "step_line"}, {"ordered_globals": ["listSum", "myList"], "stdout": "", "func_name": "listSum", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"numbers": ["REF", 2], "rest": ["REF", 3], "f": 1}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f1", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 2, "encoded_locals": {"numbers": ["REF", 3], "rest": ["REF", 4], "f": 2}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f2", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 3, "encoded_locals": {"numbers": ["REF", 4], "rest": null, "f": 3}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f3", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 4, "encoded_locals": {"numbers": null}, "is_highlighted": true, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f4", "ordered_varnames": ["numbers"]}], "globals": {"myList": ["REF", 2], "listSum": ["REF", 1]}, "heap": {"1": ["FUNCTION", "listSum(numbers)", null], "2": ["TUPLE", 1, ["REF", 3]], "3": ["TUPLE", 2, ["REF", 4]], "4": ["TUPLE", 3, null]}, "line": 1, "event": "call"}, {"ordered_globals": ["listSum", "myList"], "stdout": "", "func_name": "listSum", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"numbers": ["REF", 2], "rest": ["REF", 3], "f": 1}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f1", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 2, "encoded_locals": {"numbers": ["REF", 3], "rest": ["REF", 4], "f": 2}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f2", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 3, "encoded_locals": {"numbers": ["REF", 4], "rest": null, "f": 3}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f3", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 4, "encoded_locals": {"numbers": null}, "is_highlighted": true, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f4", "ordered_varnames": ["numbers"]}], "globals": {"myList": ["REF", 2], "listSum": ["REF", 1]}, "heap": {"1": ["FUNCTION", "listSum(numbers)", null], "2": ["TUPLE", 1, ["REF", 3]], "3": ["TUPLE", 2, ["REF", 4]], "4": ["TUPLE", 3, null]}, "line": 2, "event": "step_line"}, {"ordered_globals": ["listSum", "myList"], "stdout": "", "func_name": "listSum", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"numbers": ["REF", 2], "rest": ["REF", 3], "f": 1}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f1", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 2, "encoded_locals": {"numbers": ["REF", 3], "rest": ["REF", 4], "f": 2}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f2", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 3, "encoded_locals": {"numbers": ["REF", 4], "rest": null, "f": 3}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f3", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 4, "encoded_locals": {"numbers": null}, "is_highlighted": true, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f4", "ordered_varnames": ["numbers"]}], "globals": {"myList": ["REF", 2], "listSum": ["REF", 1]}, "heap": {"1": ["FUNCTION", "listSum(numbers)", null], "2": ["TUPLE", 1, ["REF", 3]], "3": ["TUPLE", 2, ["REF", 4]], "4": ["TUPLE", 3, null]}, "line": 3, "event": "step_line"}, {"ordered_globals": ["listSum", "myList"], "stdout": "", "func_name": "listSum", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"numbers": ["REF", 2], "rest": ["REF", 3], "f": 1}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f1", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 2, "encoded_locals": {"numbers": ["REF", 3], "rest": ["REF", 4], "f": 2}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f2", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 3, "encoded_locals": {"numbers": ["REF", 4], "rest": null, "f": 3}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f3", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 4, "encoded_locals": {"__return__": 0, "numbers": null}, "is_highlighted": true, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f4", "ordered_varnames": ["numbers", "__return__"]}], "globals": {"myList": ["REF", 2], "listSum": ["REF", 1]}, "heap": {"1": ["FUNCTION", "listSum(numbers)", null], "2": ["TUPLE", 1, ["REF", 3]], "3": ["TUPLE", 2, ["REF", 4]], "4": ["TUPLE", 3, null]}, "line": 3, "event": "return"}, {"ordered_globals": ["listSum", "myList"], "stdout": "", "func_name": "listSum", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"numbers": ["REF", 2], "rest": ["REF", 3], "f": 1}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f1", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 2, "encoded_locals": {"numbers": ["REF", 3], "rest": ["REF", 4], "f": 2}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f2", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 3, "encoded_locals": {"__return__": 3, "numbers": ["REF", 4], "rest": null, "f": 3}, "is_highlighted": true, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f3", "ordered_varnames": ["numbers", "f", "rest", "__return__"]}], "globals": {"myList": ["REF", 2], "listSum": ["REF", 1]}, "heap": {"1": ["FUNCTION", "listSum(numbers)", null], "2": ["TUPLE", 1, ["REF", 3]], "3": ["TUPLE", 2, ["REF", 4]], "4": ["TUPLE", 3, null]}, "line": 6, "event": "return"}, {"ordered_globals": ["listSum", "myList"], "stdout": "", "func_name": "listSum", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"numbers": ["REF", 2], "rest": ["REF", 3], "f": 1}, "is_highlighted": false, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f1", "ordered_varnames": ["numbers", "f", "rest"]}, {"frame_id": 2, "encoded_locals": {"__return__": 5, "numbers": ["REF", 3], "rest": ["REF", 4], "f": 2}, "is_highlighted": true, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f2", "ordered_varnames": ["numbers", "f", "rest", "__return__"]}], "globals": {"myList": ["REF", 2], "listSum": ["REF", 1]}, "heap": {"1": ["FUNCTION", "listSum(numbers)", null], "2": ["TUPLE", 1, ["REF", 3]], "3": ["TUPLE", 2, ["REF", 4]], "4": ["TUPLE", 3, null]}, "line": 6, "event": "return"}, {"ordered_globals": ["listSum", "myList"], "stdout": "", "func_name": "listSum", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"__return__": 6, "numbers": ["REF", 2], "rest": ["REF", 3], "f": 1}, "is_highlighted": true, "is_parent": false, "func_name": "listSum", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "listSum_f1", "ordered_varnames": ["numbers", "f", "rest", "__return__"]}], "globals": {"myList": ["REF", 2], "listSum": ["REF", 1]}, "heap": {"1": ["FUNCTION", "listSum(numbers)", null], "2": ["TUPLE", 1, ["REF", 3]], "3": ["TUPLE", 2, ["REF", 4]], "4": ["TUPLE", 3, null]}, "line": 6, "event": "return"}, {"ordered_globals": ["listSum", "myList", "total"], "stdout": "", "func_name": "<module>", "stack_to_render": [], "globals": {"total": 6, "myList": ["REF", 2], "listSum": ["REF", 1]}, "heap": {"1": ["FUNCTION", "listSum(numbers)", null], "2": ["TUPLE", 1, ["REF", 3]], "3": ["TUPLE", 2, ["REF", 4]], "4": ["TUPLE", 3, null]}, "line": 9, "event": "return"}]};

// Do the same for
//   python generate_json_trace.py --create_jsvar=hanoiTrace example-code/towers_of_hanoi.txt
var hanoiTrace = {"code": "# move a stack of n disks from stack a to stack b,\n# using tmp as a temporary stack\ndef TowerOfHanoi(n, a, b, tmp):\n    if n == 1:\n        b.append(a.pop())\n    else:\n        TowerOfHanoi(n-1, a, tmp, b)\n        b.append(a.pop())\n        TowerOfHanoi(n-1, tmp, b, a)\n        \nstack1 = [4,3,2,1]\nstack2 = []\nstack3 = []\n      \n# transfer stack1 to stack3 using Tower of Hanoi rules\nTowerOfHanoi(len(stack1), stack1, stack3, stack2)\n", "trace": [{"ordered_globals": [], "stdout": "", "func_name": "<module>", "stack_to_render": [], "globals": {}, "heap": {}, "line": 3, "event": "step_line"}, {"ordered_globals": ["TowerOfHanoi"], "stdout": "", "func_name": "<module>", "stack_to_render": [], "globals": {"TowerOfHanoi": ["REF", 1]}, "heap": {"1": ["FUNCTION", "TowerOfHanoi(n, a, b, tmp)", null]}, "line": 11, "event": "step_line"}, {"ordered_globals": ["TowerOfHanoi", "stack1"], "stdout": "", "func_name": "<module>", "stack_to_render": [], "globals": {"TowerOfHanoi": ["REF", 1], "stack1": ["REF", 2]}, "heap": {"1": ["FUNCTION", "TowerOfHanoi(n, a, b, tmp)", null], "2": ["LIST", 4, 3, 2, 1]}, "line": 12, "event": "step_line"}, {"ordered_globals": ["TowerOfHanoi", "stack1", "stack2"], "stdout": "", "func_name": "<module>", "stack_to_render": [], "globals": {"stack2": ["REF", 3], "TowerOfHanoi": ["REF", 1], "stack1": ["REF", 2]}, "heap": {"1": ["FUNCTION", "TowerOfHanoi(n, a, b, tmp)", null], "2": ["LIST", 4, 3, 2, 1], "3": ["LIST"]}, "line": 13, "event": "step_line"}, {"ordered_globals": ["TowerOfHanoi", "stack1", "stack2", "stack3"], "stdout": "", "func_name": "<module>", "stack_to_render": [], "globals": {"stack3": ["REF", 4], "stack2": ["REF", 3], "TowerOfHanoi": ["REF", 1], "stack1": ["REF", 2]}, "heap": {"1": ["FUNCTION", "TowerOfHanoi(n, a, b, tmp)", null], "2": ["LIST", 4, 3, 2, 1], "3": ["LIST"], "4": ["LIST"]}, "line": 16, "event": "step_line"}, {"ordered_globals": ["TowerOfHanoi", "stack1", "stack2", "stack3"], "stdout": "", "func_name": "TowerOfHanoi", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 4}, "is_highlighted": true, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f1", "ordered_varnames": ["n", "a", "b", "tmp"]}], "globals": {"stack3": ["REF", 4], "stack2": ["REF", 3], "TowerOfHanoi": ["REF", 1], "stack1": ["REF", 2]}, "heap": {"1": ["FUNCTION", "TowerOfHanoi(n, a, b, tmp)", null], "2": ["LIST", 4, 3, 2, 1], "3": ["LIST"], "4": ["LIST"]}, "line": 3, "event": "call"}, {"ordered_globals": ["TowerOfHanoi", "stack1", "stack2", "stack3"], "stdout": "", "func_name": "TowerOfHanoi", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 4}, "is_highlighted": true, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f1", "ordered_varnames": ["n", "a", "b", "tmp"]}], "globals": {"stack3": ["REF", 4], "stack2": ["REF", 3], "TowerOfHanoi": ["REF", 1], "stack1": ["REF", 2]}, "heap": {"1": ["FUNCTION", "TowerOfHanoi(n, a, b, tmp)", null], "2": ["LIST", 4, 3, 2, 1], "3": ["LIST"], "4": ["LIST"]}, "line": 4, "event": "step_line"}, {"ordered_globals": ["TowerOfHanoi", "stack1", "stack2", "stack3"], "stdout": "", "func_name": "TowerOfHanoi", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 4}, "is_highlighted": true, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f1", "ordered_varnames": ["n", "a", "b", "tmp"]}], "globals": {"stack3": ["REF", 4], "stack2": ["REF", 3], "TowerOfHanoi": ["REF", 1], "stack1": ["REF", 2]}, "heap": {"1": ["FUNCTION", "TowerOfHanoi(n, a, b, tmp)", null], "2": ["LIST", 4, 3, 2, 1], "3": ["LIST"], "4": ["LIST"]}, "line": 7, "event": "step_line"}, {"ordered_globals": ["TowerOfHanoi", "stack1", "stack2", "stack3"], "stdout": "", "func_name": "TowerOfHanoi", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 4}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f1", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 2, "encoded_locals": {"tmp": ["REF", 4], "a": ["REF", 2], "b": ["REF", 3], "n": 3}, "is_highlighted": true, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f2", "ordered_varnames": ["n", "a", "b", "tmp"]}], "globals": {"stack3": ["REF", 4], "stack2": ["REF", 3], "TowerOfHanoi": ["REF", 1], "stack1": ["REF", 2]}, "heap": {"1": ["FUNCTION", "TowerOfHanoi(n, a, b, tmp)", null], "2": ["LIST", 4, 3, 2, 1], "3": ["LIST"], "4": ["LIST"]}, "line": 3, "event": "call"}, {"ordered_globals": ["TowerOfHanoi", "stack1", "stack2", "stack3"], "stdout": "", "func_name": "TowerOfHanoi", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 4}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f1", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 2, "encoded_locals": {"tmp": ["REF", 4], "a": ["REF", 2], "b": ["REF", 3], "n": 3}, "is_highlighted": true, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f2", "ordered_varnames": ["n", "a", "b", "tmp"]}], "globals": {"stack3": ["REF", 4], "stack2": ["REF", 3], "TowerOfHanoi": ["REF", 1], "stack1": ["REF", 2]}, "heap": {"1": ["FUNCTION", "TowerOfHanoi(n, a, b, tmp)", null], "2": ["LIST", 4, 3, 2, 1], "3": ["LIST"], "4": ["LIST"]}, "line": 4, "event": "step_line"}, {"ordered_globals": ["TowerOfHanoi", "stack1", "stack2", "stack3"], "stdout": "", "func_name": "TowerOfHanoi", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 4}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f1", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 2, "encoded_locals": {"tmp": ["REF", 4], "a": ["REF", 2], "b": ["REF", 3], "n": 3}, "is_highlighted": true, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f2", "ordered_varnames": ["n", "a", "b", "tmp"]}], "globals": {"stack3": ["REF", 4], "stack2": ["REF", 3], "TowerOfHanoi": ["REF", 1], "stack1": ["REF", 2]}, "heap": {"1": ["FUNCTION", "TowerOfHanoi(n, a, b, tmp)", null], "2": ["LIST", 4, 3, 2, 1], "3": ["LIST"], "4": ["LIST"]}, "line": 7, "event": "step_line"}, {"ordered_globals": ["TowerOfHanoi", "stack1", "stack2", "stack3"], "stdout": "", "func_name": "TowerOfHanoi", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 4}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f1", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 2, "encoded_locals": {"tmp": ["REF", 4], "a": ["REF", 2], "b": ["REF", 3], "n": 3}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f2", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 3, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 2}, "is_highlighted": true, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f3", "ordered_varnames": ["n", "a", "b", "tmp"]}], "globals": {"stack3": ["REF", 4], "stack2": ["REF", 3], "TowerOfHanoi": ["REF", 1], "stack1": ["REF", 2]}, "heap": {"1": ["FUNCTION", "TowerOfHanoi(n, a, b, tmp)", null], "2": ["LIST", 4, 3, 2, 1], "3": ["LIST"], "4": ["LIST"]}, "line": 3, "event": "call"}, {"ordered_globals": ["TowerOfHanoi", "stack1", "stack2", "stack3"], "stdout": "", "func_name": "TowerOfHanoi", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 4}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f1", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 2, "encoded_locals": {"tmp": ["REF", 4], "a": ["REF", 2], "b": ["REF", 3], "n": 3}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f2", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 3, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 2}, "is_highlighted": true, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f3", "ordered_varnames": ["n", "a", "b", "tmp"]}], "globals": {"stack3": ["REF", 4], "stack2": ["REF", 3], "TowerOfHanoi": ["REF", 1], "stack1": ["REF", 2]}, "heap": {"1": ["FUNCTION", "TowerOfHanoi(n, a, b, tmp)", null], "2": ["LIST", 4, 3, 2, 1], "3": ["LIST"], "4": ["LIST"]}, "line": 4, "event": "step_line"}, {"ordered_globals": ["TowerOfHanoi", "stack1", "stack2", "stack3"], "stdout": "", "func_name": "TowerOfHanoi", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 4}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f1", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 2, "encoded_locals": {"tmp": ["REF", 4], "a": ["REF", 2], "b": ["REF", 3], "n": 3}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f2", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 3, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 2}, "is_highlighted": true, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f3", "ordered_varnames": ["n", "a", "b", "tmp"]}], "globals": {"stack3": ["REF", 4], "stack2": ["REF", 3], "TowerOfHanoi": ["REF", 1], "stack1": ["REF", 2]}, "heap": {"1": ["FUNCTION", "TowerOfHanoi(n, a, b, tmp)", null], "2": ["LIST", 4, 3, 2, 1], "3": ["LIST"], "4": ["LIST"]}, "line": 7, "event": "step_line"}, {"ordered_globals": ["TowerOfHanoi", "stack1", "stack2", "stack3"], "stdout": "", "func_name": "TowerOfHanoi", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 4}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f1", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 2, "encoded_locals": {"tmp": ["REF", 4], "a": ["REF", 2], "b": ["REF", 3], "n": 3}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f2", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 3, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 2}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f3", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 4, "encoded_locals": {"tmp": ["REF", 4], "a": ["REF", 2], "b": ["REF", 3], "n": 1}, "is_highlighted": true, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f4", "ordered_varnames": ["n", "a", "b", "tmp"]}], "globals": {"stack3": ["REF", 4], "stack2": ["REF", 3], "TowerOfHanoi": ["REF", 1], "stack1": ["REF", 2]}, "heap": {"1": ["FUNCTION", "TowerOfHanoi(n, a, b, tmp)", null], "2": ["LIST", 4, 3, 2, 1], "3": ["LIST"], "4": ["LIST"]}, "line": 3, "event": "call"}, {"ordered_globals": ["TowerOfHanoi", "stack1", "stack2", "stack3"], "stdout": "", "func_name": "TowerOfHanoi", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 4}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f1", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 2, "encoded_locals": {"tmp": ["REF", 4], "a": ["REF", 2], "b": ["REF", 3], "n": 3}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f2", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 3, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 2}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f3", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 4, "encoded_locals": {"tmp": ["REF", 4], "a": ["REF", 2], "b": ["REF", 3], "n": 1}, "is_highlighted": true, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f4", "ordered_varnames": ["n", "a", "b", "tmp"]}], "globals": {"stack3": ["REF", 4], "stack2": ["REF", 3], "TowerOfHanoi": ["REF", 1], "stack1": ["REF", 2]}, "heap": {"1": ["FUNCTION", "TowerOfHanoi(n, a, b, tmp)", null], "2": ["LIST", 4, 3, 2, 1], "3": ["LIST"], "4": ["LIST"]}, "line": 4, "event": "step_line"}, {"ordered_globals": ["TowerOfHanoi", "stack1", "stack2", "stack3"], "stdout": "", "func_name": "TowerOfHanoi", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 4}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f1", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 2, "encoded_locals": {"tmp": ["REF", 4], "a": ["REF", 2], "b": ["REF", 3], "n": 3}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f2", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 3, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 2}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f3", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 4, "encoded_locals": {"tmp": ["REF", 4], "a": ["REF", 2], "b": ["REF", 3], "n": 1}, "is_highlighted": true, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f4", "ordered_varnames": ["n", "a", "b", "tmp"]}], "globals": {"stack3": ["REF", 4], "stack2": ["REF", 3], "TowerOfHanoi": ["REF", 1], "stack1": ["REF", 2]}, "heap": {"1": ["FUNCTION", "TowerOfHanoi(n, a, b, tmp)", null], "2": ["LIST", 4, 3, 2, 1], "3": ["LIST"], "4": ["LIST"]}, "line": 5, "event": "step_line"}, {"ordered_globals": ["TowerOfHanoi", "stack1", "stack2", "stack3"], "stdout": "", "func_name": "TowerOfHanoi", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 4}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f1", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 2, "encoded_locals": {"tmp": ["REF", 4], "a": ["REF", 2], "b": ["REF", 3], "n": 3}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f2", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 3, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 2}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f3", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 4, "encoded_locals": {"tmp": ["REF", 4], "a": ["REF", 2], "__return__": null, "b": ["REF", 3], "n": 1}, "is_highlighted": true, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f4", "ordered_varnames": ["n", "a", "b", "tmp", "__return__"]}], "globals": {"stack3": ["REF", 4], "stack2": ["REF", 3], "TowerOfHanoi": ["REF", 1], "stack1": ["REF", 2]}, "heap": {"1": ["FUNCTION", "TowerOfHanoi(n, a, b, tmp)", null], "2": ["LIST", 4, 3, 2], "3": ["LIST", 1], "4": ["LIST"]}, "line": 5, "event": "return"}, {"ordered_globals": ["TowerOfHanoi", "stack1", "stack2", "stack3"], "stdout": "", "func_name": "TowerOfHanoi", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 4}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f1", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 2, "encoded_locals": {"tmp": ["REF", 4], "a": ["REF", 2], "b": ["REF", 3], "n": 3}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f2", "ordered_varnames": 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false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f13", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 15, "encoded_locals": {"tmp": ["REF", 2], "a": ["REF", 3], "b": ["REF", 4], "n": 1}, "is_highlighted": true, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f15", "ordered_varnames": ["n", "a", "b", "tmp"]}], "globals": {"stack3": ["REF", 4], "stack2": ["REF", 3], "TowerOfHanoi": ["REF", 1], "stack1": ["REF", 2]}, "heap": {"1": ["FUNCTION", "TowerOfHanoi(n, a, b, tmp)", null], "2": ["LIST"], "3": ["LIST", 1], "4": ["LIST", 4, 3, 2]}, "line": 3, "event": "call"}, {"ordered_globals": ["TowerOfHanoi", "stack1", "stack2", "stack3"], "stdout": "", "func_name": "TowerOfHanoi", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 4}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f1", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 9, "encoded_locals": {"tmp": ["REF", 2], "a": ["REF", 3], "b": ["REF", 4], "n": 3}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f9", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 13, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 2}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f13", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 15, "encoded_locals": {"tmp": ["REF", 2], "a": ["REF", 3], "b": ["REF", 4], "n": 1}, "is_highlighted": true, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f15", "ordered_varnames": ["n", "a", "b", "tmp"]}], "globals": {"stack3": ["REF", 4], "stack2": ["REF", 3], "TowerOfHanoi": ["REF", 1], "stack1": ["REF", 2]}, "heap": {"1": ["FUNCTION", "TowerOfHanoi(n, a, b, tmp)", null], "2": ["LIST"], "3": ["LIST", 1], "4": ["LIST", 4, 3, 2]}, "line": 4, "event": "step_line"}, {"ordered_globals": ["TowerOfHanoi", "stack1", "stack2", "stack3"], "stdout": "", "func_name": "TowerOfHanoi", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 4}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f1", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 9, "encoded_locals": {"tmp": ["REF", 2], "a": ["REF", 3], "b": ["REF", 4], "n": 3}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f9", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 13, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 2}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f13", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 15, "encoded_locals": {"tmp": ["REF", 2], "a": ["REF", 3], "b": ["REF", 4], "n": 1}, "is_highlighted": true, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f15", "ordered_varnames": ["n", "a", "b", "tmp"]}], "globals": {"stack3": ["REF", 4], "stack2": ["REF", 3], "TowerOfHanoi": ["REF", 1], "stack1": ["REF", 2]}, "heap": {"1": ["FUNCTION", "TowerOfHanoi(n, a, b, tmp)", null], "2": ["LIST"], "3": ["LIST", 1], "4": ["LIST", 4, 3, 2]}, "line": 5, "event": "step_line"}, {"ordered_globals": ["TowerOfHanoi", "stack1", "stack2", "stack3"], "stdout": "", "func_name": "TowerOfHanoi", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 4}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f1", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 9, "encoded_locals": {"tmp": ["REF", 2], "a": ["REF", 3], "b": ["REF", 4], "n": 3}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f9", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 13, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 2}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f13", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 15, "encoded_locals": {"tmp": ["REF", 2], "a": ["REF", 3], "__return__": null, "b": ["REF", 4], "n": 1}, "is_highlighted": true, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_jhash": "TowerOfHanoi_f15", "ordered_varnames": ["n", "a", "b", "tmp", "__return__"]}], "globals": {"stack3": ["REF", 4], "stack2": ["REF", 3], "TowerOfHanoi": ["REF", 1], "stack1": ["REF", 2]}, "heap": {"1": ["FUNCTION", "TowerOfHanoi(n, a, b, tmp)", null], "2": ["LIST"], "3": ["LIST"], "4": ["LIST", 4, 3, 2, 1]}, "line": 5, "event": "return"}, {"ordered_globals": ["TowerOfHanoi", "stack1", "stack2", "stack3"], "stdout": "", "func_name": "TowerOfHanoi", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 4}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f1", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 9, "encoded_locals": {"tmp": ["REF", 2], "a": ["REF", 3], "b": ["REF", 4], "n": 3}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f9", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 13, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "__return__": null, "b": ["REF", 4], "n": 2}, "is_highlighted": true, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f13", "ordered_varnames": ["n", "a", "b", "tmp", "__return__"]}], "globals": {"stack3": ["REF", 4], "stack2": ["REF", 3], "TowerOfHanoi": ["REF", 1], "stack1": ["REF", 2]}, "heap": {"1": ["FUNCTION", "TowerOfHanoi(n, a, b, tmp)", null], "2": ["LIST"], "3": ["LIST"], "4": ["LIST", 4, 3, 2, 1]}, "line": 9, "event": "return"}, {"ordered_globals": ["TowerOfHanoi", "stack1", "stack2", "stack3"], "stdout": "", "func_name": "TowerOfHanoi", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "b": ["REF", 4], "n": 4}, "is_highlighted": false, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f1", "ordered_varnames": ["n", "a", "b", "tmp"]}, {"frame_id": 9, "encoded_locals": {"tmp": ["REF", 2], "a": ["REF", 3], "__return__": null, "b": ["REF", 4], "n": 3}, "is_highlighted": true, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f9", "ordered_varnames": ["n", "a", "b", "tmp", "__return__"]}], "globals": {"stack3": ["REF", 4], "stack2": ["REF", 3], "TowerOfHanoi": ["REF", 1], "stack1": ["REF", 2]}, "heap": {"1": ["FUNCTION", "TowerOfHanoi(n, a, b, tmp)", null], "2": ["LIST"], "3": ["LIST"], "4": ["LIST", 4, 3, 2, 1]}, "line": 9, "event": "return"}, {"ordered_globals": ["TowerOfHanoi", "stack1", "stack2", "stack3"], "stdout": "", "func_name": "TowerOfHanoi", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"tmp": ["REF", 3], "a": ["REF", 2], "__return__": null, "b": ["REF", 4], "n": 4}, "is_highlighted": true, "is_parent": false, "func_name": "TowerOfHanoi", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "TowerOfHanoi_f1", "ordered_varnames": ["n", "a", "b", "tmp", "__return__"]}], "globals": {"stack3": ["REF", 4], "stack2": ["REF", 3], "TowerOfHanoi": ["REF", 1], "stack1": ["REF", 2]}, "heap": {"1": ["FUNCTION", "TowerOfHanoi(n, a, b, tmp)", null], "2": ["LIST"], "3": ["LIST"], "4": ["LIST", 4, 3, 2, 1]}, "line": 9, "event": "return"}, {"ordered_globals": ["TowerOfHanoi", "stack1", "stack2", "stack3"], "stdout": "", "func_name": "<module>", "stack_to_render": [], "globals": {"stack3": ["REF", 4], "stack2": ["REF", 3], "TowerOfHanoi": ["REF", 1], "stack1": ["REF", 2]}, "heap": {"1": ["FUNCTION", "TowerOfHanoi(n, a, b, tmp)", null], "2": ["LIST"], "3": ["LIST"], "4": ["LIST", 4, 3, 2, 1]}, "line": 16, "event": "return"}]};

// And finally, let's generate one last trace and copy it in here:
//   python generate_json_trace.py --create_jsvar=happyTrace example-code/happy.txt
var happyTrace = {"code": "# From \"Teaching with Python\" by John Zelle\ndef happy():\n    print(\"Happy Birthday to you!\")\n\ndef sing(P):\n    happy()\n    happy()\n    print(\"Happy Birthday dear \" + P + \"!\")\n    happy()\n\n# main\nsing(\"Fred\")\n", "trace": [{"ordered_globals": [], "stdout": "", "func_name": "<module>", "stack_to_render": [], "globals": {}, "heap": {}, "line": 2, "event": "step_line"}, {"ordered_globals": ["happy"], "stdout": "", "func_name": "<module>", "stack_to_render": [], "globals": {"happy": ["REF", 1]}, "heap": {"1": ["FUNCTION", "happy()", null]}, "line": 5, "event": "step_line"}, {"ordered_globals": ["happy", "sing"], "stdout": "", "func_name": "<module>", "stack_to_render": [], "globals": {"sing": ["REF", 2], "happy": ["REF", 1]}, "heap": {"1": ["FUNCTION", "happy()", null], "2": ["FUNCTION", "sing(P)", null]}, "line": 12, "event": "step_line"}, {"ordered_globals": ["happy", "sing"], "stdout": "", "func_name": "sing", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"P": "Fred"}, "is_highlighted": true, "is_parent": false, "func_name": "sing", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "sing_f1", "ordered_varnames": ["P"]}], "globals": {"sing": ["REF", 2], "happy": ["REF", 1]}, "heap": {"1": ["FUNCTION", "happy()", null], "2": ["FUNCTION", "sing(P)", null]}, "line": 5, "event": "call"}, {"ordered_globals": ["happy", "sing"], "stdout": "", "func_name": "sing", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"P": "Fred"}, "is_highlighted": true, "is_parent": false, "func_name": "sing", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "sing_f1", "ordered_varnames": ["P"]}], "globals": {"sing": ["REF", 2], "happy": ["REF", 1]}, "heap": {"1": ["FUNCTION", "happy()", null], "2": ["FUNCTION", "sing(P)", null]}, "line": 6, "event": "step_line"}, {"ordered_globals": ["happy", "sing"], "stdout": "", "func_name": "happy", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"P": "Fred"}, "is_highlighted": false, "is_parent": false, "func_name": "sing", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "sing_f1", "ordered_varnames": ["P"]}, {"frame_id": 2, "encoded_locals": {}, "is_highlighted": true, "is_parent": false, "func_name": "happy", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "happy_f2", "ordered_varnames": []}], "globals": {"sing": ["REF", 2], "happy": ["REF", 1]}, "heap": {"1": ["FUNCTION", "happy()", null], "2": ["FUNCTION", "sing(P)", null]}, "line": 2, "event": "call"}, {"ordered_globals": ["happy", "sing"], "stdout": "", "func_name": "happy", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"P": "Fred"}, "is_highlighted": false, "is_parent": false, "func_name": "sing", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "sing_f1", "ordered_varnames": ["P"]}, {"frame_id": 2, "encoded_locals": {}, "is_highlighted": true, "is_parent": false, "func_name": "happy", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "happy_f2", "ordered_varnames": []}], "globals": {"sing": ["REF", 2], "happy": ["REF", 1]}, "heap": {"1": ["FUNCTION", "happy()", null], "2": ["FUNCTION", "sing(P)", null]}, "line": 3, "event": "step_line"}, {"ordered_globals": ["happy", "sing"], "stdout": "Happy Birthday to you!\n", "func_name": "happy", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"P": "Fred"}, "is_highlighted": false, "is_parent": false, "func_name": "sing", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "sing_f1", "ordered_varnames": ["P"]}, {"frame_id": 2, "encoded_locals": {"__return__": null}, "is_highlighted": true, "is_parent": false, "func_name": "happy", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "happy_f2", "ordered_varnames": ["__return__"]}], "globals": {"sing": ["REF", 2], "happy": ["REF", 1]}, "heap": {"1": ["FUNCTION", "happy()", null], "2": ["FUNCTION", "sing(P)", null]}, "line": 3, "event": "return"}, {"ordered_globals": ["happy", "sing"], "stdout": "Happy Birthday to you!\n", "func_name": "sing", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"P": "Fred"}, "is_highlighted": true, "is_parent": false, "func_name": "sing", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "sing_f1", "ordered_varnames": ["P"]}], "globals": {"sing": ["REF", 2], "happy": ["REF", 1]}, "heap": {"1": ["FUNCTION", "happy()", null], "2": ["FUNCTION", "sing(P)", null]}, "line": 7, "event": "step_line"}, {"ordered_globals": ["happy", "sing"], "stdout": "Happy Birthday to you!\n", "func_name": "happy", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"P": "Fred"}, "is_highlighted": false, "is_parent": false, "func_name": "sing", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "sing_f1", "ordered_varnames": ["P"]}, {"frame_id": 3, "encoded_locals": {}, "is_highlighted": true, "is_parent": false, "func_name": "happy", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "happy_f3", "ordered_varnames": []}], "globals": {"sing": ["REF", 2], "happy": ["REF", 1]}, "heap": {"1": ["FUNCTION", "happy()", null], "2": ["FUNCTION", "sing(P)", null]}, "line": 2, "event": "call"}, {"ordered_globals": ["happy", "sing"], "stdout": "Happy Birthday to you!\n", "func_name": "happy", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"P": "Fred"}, "is_highlighted": false, "is_parent": false, "func_name": "sing", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "sing_f1", "ordered_varnames": ["P"]}, {"frame_id": 3, "encoded_locals": {}, "is_highlighted": true, "is_parent": false, "func_name": "happy", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "happy_f3", "ordered_varnames": []}], "globals": {"sing": ["REF", 2], "happy": ["REF", 1]}, "heap": {"1": ["FUNCTION", "happy()", null], "2": ["FUNCTION", "sing(P)", null]}, "line": 3, "event": "step_line"}, {"ordered_globals": ["happy", "sing"], "stdout": "Happy Birthday to you!\nHappy Birthday to you!\n", "func_name": "happy", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"P": "Fred"}, "is_highlighted": false, "is_parent": false, "func_name": "sing", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "sing_f1", "ordered_varnames": ["P"]}, {"frame_id": 3, "encoded_locals": {"__return__": null}, "is_highlighted": true, "is_parent": false, "func_name": "happy", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "happy_f3", "ordered_varnames": ["__return__"]}], "globals": {"sing": ["REF", 2], "happy": ["REF", 1]}, "heap": {"1": ["FUNCTION", "happy()", null], "2": ["FUNCTION", "sing(P)", null]}, "line": 3, "event": "return"}, {"ordered_globals": ["happy", "sing"], "stdout": "Happy Birthday to you!\nHappy Birthday to you!\n", "func_name": "sing", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"P": "Fred"}, "is_highlighted": true, "is_parent": false, "func_name": "sing", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "sing_f1", "ordered_varnames": ["P"]}], "globals": {"sing": ["REF", 2], "happy": ["REF", 1]}, "heap": {"1": ["FUNCTION", "happy()", null], "2": ["FUNCTION", "sing(P)", null]}, "line": 8, "event": "step_line"}, {"ordered_globals": ["happy", "sing"], "stdout": "Happy Birthday to you!\nHappy Birthday to you!\nHappy Birthday dear Fred!\n", "func_name": "sing", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"P": "Fred"}, "is_highlighted": true, "is_parent": false, "func_name": "sing", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "sing_f1", "ordered_varnames": ["P"]}], "globals": {"sing": ["REF", 2], "happy": ["REF", 1]}, "heap": {"1": ["FUNCTION", "happy()", null], "2": ["FUNCTION", "sing(P)", null]}, "line": 9, "event": "step_line"}, {"ordered_globals": ["happy", "sing"], "stdout": "Happy Birthday to you!\nHappy Birthday to you!\nHappy Birthday dear Fred!\n", "func_name": "happy", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"P": "Fred"}, "is_highlighted": false, "is_parent": false, "func_name": "sing", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "sing_f1", "ordered_varnames": ["P"]}, {"frame_id": 4, "encoded_locals": {}, "is_highlighted": true, "is_parent": false, "func_name": "happy", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "happy_f4", "ordered_varnames": []}], "globals": {"sing": ["REF", 2], "happy": ["REF", 1]}, "heap": {"1": ["FUNCTION", "happy()", null], "2": ["FUNCTION", "sing(P)", null]}, "line": 2, "event": "call"}, {"ordered_globals": ["happy", "sing"], "stdout": "Happy Birthday to you!\nHappy Birthday to you!\nHappy Birthday dear Fred!\n", "func_name": "happy", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"P": "Fred"}, "is_highlighted": false, "is_parent": false, "func_name": "sing", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "sing_f1", "ordered_varnames": ["P"]}, {"frame_id": 4, "encoded_locals": {}, "is_highlighted": true, "is_parent": false, "func_name": "happy", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "happy_f4", "ordered_varnames": []}], "globals": {"sing": ["REF", 2], "happy": ["REF", 1]}, "heap": {"1": ["FUNCTION", "happy()", null], "2": ["FUNCTION", "sing(P)", null]}, "line": 3, "event": "step_line"}, {"ordered_globals": ["happy", "sing"], "stdout": "Happy Birthday to you!\nHappy Birthday to you!\nHappy Birthday dear Fred!\nHappy Birthday to you!\n", "func_name": "happy", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"P": "Fred"}, "is_highlighted": false, "is_parent": false, "func_name": "sing", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "sing_f1", "ordered_varnames": ["P"]}, {"frame_id": 4, "encoded_locals": {"__return__": null}, "is_highlighted": true, "is_parent": false, "func_name": "happy", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "happy_f4", "ordered_varnames": ["__return__"]}], "globals": {"sing": ["REF", 2], "happy": ["REF", 1]}, "heap": {"1": ["FUNCTION", "happy()", null], "2": ["FUNCTION", "sing(P)", null]}, "line": 3, "event": "return"}, {"ordered_globals": ["happy", "sing"], "stdout": "Happy Birthday to you!\nHappy Birthday to you!\nHappy Birthday dear Fred!\nHappy Birthday to you!\n", "func_name": "sing", "stack_to_render": [{"frame_id": 1, "encoded_locals": {"__return__": null, "P": "Fred"}, "is_highlighted": true, "is_parent": false, "func_name": "sing", "is_zombie": false, "parent_frame_id_list": [], "unique_hash": "sing_f1", "ordered_varnames": ["P", "__return__"]}], "globals": {"sing": ["REF", 2], "happy": ["REF", 1]}, "heap": {"1": ["FUNCTION", "happy()", null], "2": ["FUNCTION", "sing(P)", null]}, "line": 9, "event": "return"}, {"ordered_globals": ["happy", "sing"], "stdout": "Happy Birthday to you!\nHappy Birthday to you!\nHappy Birthday dear Fred!\nHappy Birthday to you!\n", "func_name": "<module>", "stack_to_render": [], "globals": {"sing": ["REF", 2], "happy": ["REF", 1]}, "heap": {"1": ["FUNCTION", "happy()", null], "2": ["FUNCTION", "sing(P)", null]}, "line": 12, "event": "return"}]};


// 2. When the HTML document finishes loading, populate the three divs
//    (listSumDiv, hanoiDiv, happyDiv) with the visualizations
//    corresponding to the respective traces.
$(document).ready(function() {

  // 3. Create a new ExecutionVisualizer object for each visualization.
  //    (See js/pytutor.js for the full specs of ExecutionVisualizer.)
  //
  //    The basic idea is that the parent div name is passed as the first argument,
  //    and the trace object is passed as the second argument.
  //
  //    The third argument contains optional parameters.

  // Note that "embeddedMode: true" makes the visualizer appear more compact on-screen.
  // editCodeBaseURL is the base URL to prepend onto the 'Edit code' link.


  // A more subtle point is that when some div in your HTML webpage
  // (such as a visualizer div) expands in height, it will "push down"
  // all divs below it, but the SVG arrows rendered by jsPlumb
  // WILL NOT MOVE. Thus, they will be in the incorrect location
  // unless you call redrawAllConnectors().
  //
  // We use the "heightChangeCallback" optional parameter to force redraw
  // of all SVG arrows of ALL visualizers, whenever the height of one changes.
  //
  // Alternatively, here is one jQuery plugin that you can use to detect div height changes:
  // http://benalman.com/projects/jquery-resize-plugin/
  //
  // A related trick you can implement is to make a div never shrink in height once it's grown;
  // that way, you can avoid lots of jarring jumps and (inefficient) redraws.

  // Render listSumTrace inside of listSumDiv
  var listSumVisualizer = new ExecutionVisualizer('listSumDiv', listSumTrace,
                                                  {embeddedMode: true,
                                                   heightChangeCallback: redrawAllVisualizerArrows,
                                                   editCodeBaseURL: 'http://pythontutor.com/visualize.html'});

  // The "startingInstruction: 15" optional parameter means to jump to step 15
  // in the visualization when it loads. (The HTML webpage will actually display
  // "Step 16 of 64" since indices are zero-indexed.)
  //
  // verticalStack means to stack the code and visualizations vertically atop one another
  // (rather than side-by-side)
  var hanoiVisualizer   = new ExecutionVisualizer('hanoiDiv', hanoiTrace,
                                                  {embeddedMode: true,
                                                   startingInstruction: 15,
                                                   verticalStack: true,
                                                   heightChangeCallback: redrawAllVisualizerArrows,
                                                   editCodeBaseURL: 'http://pythontutor.com/visualize.html'});

  // "embeddedMode: false" displays the full visualizer widget with the "Program Output" pane
  // "jumpToEnd: true" means to jump to the end of execution upon loading.
  var happyVisualizer   = new ExecutionVisualizer('happyDiv', happyTrace,
                                                  {embeddedMode: false,
                                                   jumpToEnd: true,
                                                   codeDivWidth: 450,
                                                   codeDivHeight: 150,
                                                   // no need for heightChangeCallback since
                                                   // this is the "bottom-most" visualizer,
                                                   // so no arrows appear below it
                                                   editCodeBaseURL: 'http://pythontutor.com/visualize.html'});

  function redrawAllVisualizerArrows() {
    if (listSumVisualizer) listSumVisualizer.redrawConnectors();
    if (hanoiVisualizer) hanoiVisualizer.redrawConnectors();
    if (happyVisualizer) happyVisualizer.redrawConnectors();
  }


  // Call redrawConnectors() on all visualizers whenever the window is resized,
  // since HTML elements might have moved during a resize. The SVG arrows rendered
  // by jsPlumb don't automatically get re-drawn in their new positions unless
  // redrawConnectors() is called.
  $(window).resize(redrawAllVisualizerArrows);

  redrawAllVisualizerArrows(); // do it once at the end
});