The `traceback` module contains functionality similar to Python's [traceback](http://docs.python.org/library/traceback.html) module. ## JSON Traceback Objects ## Tracebacks are stored in JSON format. The stack is represented as an array in which the most recent stack frame is the last element; each element thus represents a stack frame and has the following keys:
filename |
The name of the file that the stack frame takes place in. |
lineNo |
The line number is being executed at the stack frame. |
funcName |
The name of the function being executed at the stack frame, or
null if the function is anonymous or the stack frame is
being executed in a top-level script or module. |