25

traceback.format_exc()

can get it with raising an exception.

traceback.print_stack()

prints the stack without an exception needed, but it does not return a string.

There doesn't seem to be a way to get the stack trace string without raising an exception in python?

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34

It's traceback.extract_stack() if you want convenient access to module and function names and line numbers, or ''.join(traceback.format_stack()) if you just want a string that looks like the traceback.print_stack() output.

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2 Comments

Notice that even with ''.join you will get a multiline string, since the elements of format_stack() contain \ns.
The stacktrace I got in my app with format_stack had many layers I wasn't interested in and would never get picked up by the normal debugger. format_exception had less noise for me in a Flask app and looked closer to the normal stack dumps in my running output: stackoverflow.com/questions/62952273/…
4

How about traceback.format_stack?

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2

Use the inspect module. In particular, inspect. currentframe() -- but the whole module is there for the purpose of looking at the state of your program at a given time.

Some useful inspect tricks here.

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1

Also try the "py-spy" module, which can connect to a python process and get the instantaneous stack dump.

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