[3.8] bpo-43295: Fix error handling of datetime.strptime format string '%z' (GH-24627) #24729
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…pythonGH-24627) Previously, `datetime.strptime` would match `'z'` with the format string `'%z'` (for UTC offsets), throwing an `IndexError` by erroneously trying to parse `'z'` as a timestamp. As a special case, `'%z'` matches the string `'Z'` which is equivalent to the offset `'+00:00'`, however this behavior is not defined for lowercase `'z'`. This change ensures a `ValueError` is thrown when encountering the original example, as follows: ``` >>> from datetime import datetime >>> datetime.strptime('z', '%z') ValueError: time data 'z' does not match format '%z' ``` Automerge-Triggered-By: GH:pganssle (cherry picked from commit 04f6fbb) Co-authored-by: Noor Michael <nsmichael31@gmail.com>
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@noormichael: Status check is done, and it's a success ✅ . |
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This PR is stale because it has been open for 30 days with no activity. |
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Closing this stale backport as the 3.8 is nearing to security-fix only mode. |
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Previously,
datetime.strptimewould match'z'with the format string'%z'(for UTC offsets), throwing anIndexErrorby erroneously trying to parse'z'as a timestamp. As a special case,'%z'matches the string'Z'which is equivalent to the offset'+00:00', however this behavior is not defined for lowercase'z'.This change ensures a
ValueErroris thrown when encountering the original example, as follows:Automerge-Triggered-By: GH:pganssle
(cherry picked from commit 04f6fbb)
Co-authored-by: Noor Michael nsmichael31@gmail.com
https://bugs.python.org/issue43295