fix: make MagicFactory work as a method descriptor - #737
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tlambert03 merged 2 commits intoAug 29, 2026
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magic_factory used on a method did not bind the instance: functools.partial had no __get__ before Python 3.13, so self was never passed, and from 3.13 on partial.__get__ binds the instance as the first positional argument of the factory (which only accepts keyword arguments). Either way calling the resulting widget raised TypeError: missing a required argument: 'self'. MagicFactory now implements __get__ itself, returning a factory whose first parameter is bound to the instance, mirroring FunctionGui.__get__. Adds tests/test_factory.py::test_magic_factory_as_method.
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## main #737 +/- ##
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- Coverage 90.15% 90.15% -0.01%
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Files 43 43
Lines 5314 5323 +9
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+ Hits 4791 4799 +8
- Misses 523 524 +1 ☔ View full report in Codecov by Harness. 🚀 New features to boost your workflow:
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thanks for the fix! Sorry for the dealy |
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Closes #733
functools.partialhad no__get__before Python 3.13, so a@magic_factoryused on a method never received the instance; from 3.13 onpartial.__get__binds the instance as the first positional argument, whichMagicFactory.__call__rejects. Either way calling the resulting widget raisedTypeError: missing a required argument: 'self'.MagicFactorynow implements__get__itself and returns a factory that binds its first parameter to the instance, mirroringFunctionGui.__get__. Newtests/test_factory.py::test_magic_factory_as_methodfails without the fix and passes with it.