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From: Terry Reedy <tjreedy@udel.edu>
Subject: Re: How to trace the recursive path?
Date: Wed, 5 Aug 2015 21:15:37 -0400
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Xref: csiph.com comp.lang.python:95052

trace --trackcalls
Display the calling relationships exposed by running the program.

will give you part of what you want, but only counts.

I would just add print('xyx calledl') at the top of each function you 
want traced.

-- 
Terry Jan Reedy