CODEWITHSUNDEEP
pythonpython-3.xexceptionindex-error
Brad Dwyer
Brad Dwyer

Reputation: 6494

Python still throwing exception I've explicitly excepted

I've got some code that I know will fail in the edge case where the list is empty so I added exception handling for IndexError.

But, despite handling the exception, it's still getting raised.

~/Code/foo.py in decode_tokens(tokens)
    196                 new_toks.append(new_tok)
    197             else:
--> 198                 try: new_toks[-1] += new_tok
    199                 except IndexError: pass
    200             new_elem = True

IndexError: list index out of range

I don't understand how if I'm explicitly excepting IndexError why it's still getting raised and aborting script execution.

Edit: adding that this is Python 3.6 running in a Jupyter notebook. As it looked like a python error I didn't think that was relevant (but it sounds like it might be.)

Upvotes: 1

Views: 61

Answers (1)

roganjosh
roganjosh

Reputation: 13175

Editors that support IPython, which include Jupyter, do not always reload modules even after they have been edited. I think this might be an unfortunate coincidence; the line that the error is thrown happens to coincide with the line of your exception handler after an edit. Likely the code that threw the error isn't what's at that line now. You may wish to force a reload of imported modules each time you run a script, or at least restart the underlying IPython kernel for now.

Upvotes: 2

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