Comments (4)
coady
commented on June 10, 2024
Methods are already supported:
class Negator:
@multimethod
def neg(self, arg: int):
return -arg
@neg.register
def _(self, arg: bool):
return not arg
In []: Negator().neg(1)
Out[]: -1
In []: Negator().neg(True)
Out[]: FalseIf a param on the left has no annotation, it's equivalent to having an : object annotation.
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Dr-ZeeD
commented on June 10, 2024
Actually, I was thinking of support of the register method without type annotation. But I reckon it's possible using object as first type?
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coady
commented on June 10, 2024
Ah, yes: .register(object, ...) works.
I guess it's time to fully support and document @register(*types). This project pre-dates Python 3 and singledispatch, and it wasn't clear if annotations would be preferred. But the original singledispatch style still seems popular, even with the end of Python 2.
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coady
commented on June 10, 2024
da2fdb3 documents this feature more clearly. Thanks.
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Related Issues (20)
- Regression in 1.10 regarding typing.Literal HOT 6
- Clarify if `@multimethod` works with position-or-keyword arguments HOT 1
- Clarify "Positional-only" in Readme HOT 1
- type `__args__` should be retrieved using `typing.get_args()` HOT 2
- Version 1.11 does not allow concrete protocol subclasses HOT 7
- Version 1.11 breaks dispatch on Union objects with custom metaclass HOT 3
- Subclass methods
- TypeError in new version 1.11.1 HOT 6
- `Self` cannot be used with `issubclass` HOT 8
- Variable positional arguments HOT 2
- Minor Typo HOT 1
- Stacking custom decorators with @multimethod HOT 2
- Strange behaviour with pandas function application methods HOT 1
- multimethod "forgets" keyword only arguments HOT 2
- Documentation isn't updated? HOT 5
- Overload fails on Optional arguments HOT 1
- flake8 reports redefinition when using multimethod HOT 2
- Classmethod fails on the uninitialized class object HOT 2
- Different names for the multimethod in a class does not work with staticmethod and classmethod decorators HOT 1
- PEP about multiple dispatch and @typing.overload
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