BUG: fix a bug where calling distutils.build_ext.finalize_options more than once would raise an exception
#5083
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Sep 14, 2025
| if self.undef: | ||
| self.undef = self.undef.split(',') | ||
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| if self.swig_opts is None: |
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In case the bug isn't obvious: this if/else fork originally assumed that self.swig_opts could be either None or str, but it immediately binds it to a list, so it fails on the second pass with AttributeError: list has no attribute 'split'.
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…ore than once would raise an exception
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distutils.build_ext.finalize_optionsdistutils.build_ext.finalize_options more than once would raise an exception
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this evolved into 2 separate bug fixes, so I split the second one out into #5084 |
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Summary of changes
This allows
build_ext.finalize_optionsto be called more than once without crashing. This is helpful in h5py and yt where we cannot really finalize options of this class before needing side effects (which live in therunmethod, as recommended).I'm opening as a draft and without a test for now because I'm running out of time but I'll make sure to add one before opening for review.
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