Implement Path.__deepcopy__ avoiding infinite recursion #30198
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I tried the same strategy with EDIT: this is actually easier to fix by just doing the shallow copy without |
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I changed this to remove the metaclass and implement the |
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lib/matplotlib/path.py
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| if memo is None: | ||
| memo = {} |
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This is not needed, memo is always a dict.
The default value for memo is also not needed. The memo argument is always passed to __deepcopy__().
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Yes, when called via copy.deepcopy, but this __deepcopy__ method is also aliased to deepcopy (just below the GitHub patch context) that is part of the public API of this class
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we could change our deepcopy to call copy.deepcopy internally (which might bet better?)
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To deep copy an object without calling deepcopy on the object itself, create a new object of the correct class and iterate calling deepcopy on its __dict__. Closes matplotlib#29157 without relying on private CPython methods. Does not fix the other issue with TransformNode.__copy__. Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
Co-authored-by: Elliott Sales de Andrade <quantum.analyst@gmail.com>
without calling copy.copy
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I tried this out on Fedora Rawhide with Python 3.14, and it worked.
…finite recursion
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Thank you @jkseppan ! This is a better solution than my "reach up and touch private methods" version. |
…198-on-v3.10.x Backport PR #30198 on branch v3.10.x (Implement Path.__deepcopy__ avoiding infinite recursion)
* matplotlib/matplotlib#30198: Python 3.14 compatible deepcopy. * What's New entry. * What's new line break. * Fix Sphinx bug with duplicated labels. * What's New addition. * Remove Python<3.14 pin from pyproject.toml; indicating compatibility, but not yet support (i.e. CI unchanged for now). * Better deepcopy docstring.
Implement
Path.__deepcopy__avoiding infinite recursionTo deep copy an object without calling deepcopy on the object itself, create a new object of the correct class and iterate calling deepcopy on its
__dict__.Closes #29157 without relying on private CPython methods.
In a separate commit, fix the other issue with
TransformNode.__copy__.PR summary
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