MNT: migrate from codecs.open to open #62073
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ngoldbaum
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Aug 8, 2025
| assert not icom.is_fsspec_url("filecache::://pandas/test.csv") | ||
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| @pytest.mark.parametrize("encoding", [None, "utf-8"]) |
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I could also keep testing this but CPython warns about using open(..., encoding=None): EncodingWarning: 'encoding' argument not specified. In this case we are explicitly specifying None but I don't think CPython can tell the difference.
ngoldbaum
commented
Aug 8, 2025
| else: | ||
| assert isinstance(as_json, str) # needed for mypy | ||
| with codecs.open(as_json, "wb", encoding="utf8") as f: | ||
| with open(as_json, "w", encoding="utf-8") as f: |
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I changed it from "wb" to "w" because I think the "b" here is a bug (bytes and utf-8???)
mroeschke
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Aug 8, 2025
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Thanks @ngoldbaum |
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c.f. #61950, towards supporting Python 3.14
See the 3.14 deprecations and python/cpython#133036 for more details.
There is one spot that was nontrivial - the use in
pandas.util._print_versionsI think was buggy - it wanted to write a file in bytes mode and also specified an encoding.codecs.opendidn't blink at this but regularopenis more restrictive. I think what I updated it to is correct and this is a latent bug, probably introduced a long time ago in the 2->3 transition.doc/source/whatsnew/vX.X.X.rstfile if fixing a bug or adding a new feature.