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When to Raise a Python KeyError in Your Code

KeyError Exceptions in Python and How to Handle Them Rich Bibby 00:39

There may be times when it makes sense for you to raise a Python KeyError exception in your own code. You can do this by using the raise keyword and calling the KeyError exception:

raise KeyError(message)

Usually, the message would be the missing key, but you could provide a bit more information to help the next developer better understand what went wrong.

00:00 There may be times when it makes sense for you to raise a Python KeyError exception in your own code. This can be done simply by using the raise keyword and calling the KeyError exception. Usually, the message would be the missing key. However, as in the case of the zipfile package, you could opt to give it a bit more information to help the next developer better understand what went wrong.

00:24 If you do decide to raise a Python KeyError in your own code, just make sure that your use case matches the semantic meaning behind the exception. It should denote that the key being looked for could not be found.

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