Python: How can I know which exceptions might be thrown from a method call

Question

Is there a way knowing (at coding time) which exceptions to expect when executing python code? I end up catching the base Exception class 90% of the time since I don\'t kno

Answer 1

normally, you'd need to catch exception only around a few lines of code. You wouldn't want to put your whole main function into the try except clause. for every few line you always should now (or be able easily to check) what kind of exception might be raised.

docs have an exhaustive list of built-in exceptions. don't try to except those exception that you're not expecting, they might be handled/expected in the calling code.

edit: what might be thrown depends on obviously on what you're doing! accessing random element of a sequence: IndexError, random element of a dict: KeyError, etc.

Just try to run those few lines in IDLE and cause an exception. But unittest would be a better solution, naturally.