[Python] How can I step to use the python debugger to break at every function call?

I want to closely monitor the chain of function calls which are called from a certain function.

import pdb; pdb.set_trace()
res = api.InsertVideoEntry(video_entry, video)


I'm looking for a way to easily see that api.insertVideoEntry(video_entry, video) calls foo() which calls bar() which calls baz(),

Here's a really crude diagram to show what I mean. I don't need it in this form, but this is the kind kind of information I'm looking for.

api.insertVideoEntry()
foo()
bar()
baz()
baz2()
log()
finish()

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