Tracing code

The trace module provides a powerful and easy tool to trace which lines of code were executed during a run.

Tracing can be used both to ensure testing coverage and to see the behavior of our software or third-party function.

How to do it...

You need to perform the following steps for this recipe:

1. We can implement a function that traces the execution of a provided function and returns the modules that were executed and the lines for each module:

import trace
import collections

def report_tracing(func, *args, **kwargs):
    outputs = collections.defaultdict(list)

    tracing = trace.Trace(trace=False)
    tracing.runfunc(func, *args, **kwargs)

    traced = collections.defaultdict(set)
    for filename, line...