Update __new__ method to use Self type for improved type hinting #918
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fleming79
commented
Mar 9, 2025
| cls = args[0] | ||
| args = args[1:] | ||
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| def __new__(cls, /, *args: t.Any, **kwargs: t.Any) -> Self: |
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Use of the position-only character / means cls can be passed as a keyword argument.
Refs:
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Thanks! |
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Recently Pylance (Pyright) started producing
Anyas the type hint for HasTraits objects since Pylance v 2025.2.102 & Pyright v 1.1.395. This may be related to the first dot point in the Pyright release notes here: https://github.com/microsoft/pyright/releases/tag/1.1.395.Before
After
Reference: https://typing.python.org/en/latest/spec/constructors.html#consistency-of-new-and-init