I have a traceback object that I want to show in the nice format I get when calling traceback.format_exc().
Is there a builtin function for this? Or a few lines of code?
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5 Answers
format_exc() is really just
etype, value, tb = sys.exc_info()
return ''.join(format_exception(etype, value, tb, limit))
So if you have the exception type, value, and traceback ready, it should be easy. If you have just the exception, notice that format_exception() is essentially:
a_list = ['Traceback (most recent call last):\n']
a_list = a_list + format_tb(tb, limit)
where limit defaults to None.
Example:
To further aid in clarifying a (simple) application of format_exc():
import traceback
try:
# Some code
except Exception:
print('\nThe following error occurred:\n',
traceback.format_exc(),
'Processing aborted.\n',
sep='\n')
# sys.exit(1)
2 Comments
Nic Scozzaro
I think I'm the only one that doesn't understand this answer... This answer doesn't say where to import
format_tb, and is using the built in list as a variable. And I still don't understand how to print the traceback.
Have you tried traceback.print_tb or traceback.format_tb?
Comments
Couldn't find this anywhere, so I'm posting it here for future people and my future self.
try:
raise Exception('Not an Exception')
except Exception as err:
msg = "".join(traceback.format_exception(type(err), err, err.__traceback__))
print(msg)
This takes your exception and provides a string formatted identically to python's default exception printer/print_tb
Comments
traceback docs give few examples and whole set of functions for formatting traceback objects.
Comments
See also traceback.print_exc()
