Property setter not accepted if not next to getter

[mihneagiurgea]

The following code incorrectly raises an error:

class Config(object):

    @property
    def my_proprty(self):
        return None

    def _other(self):
        pass

    @my_proprty.setter
    def my_proprty(self, val):
        pass

Error:

mypytest.py: note: In class "Config":
mypytest.py:12: error: Callable[[Any], Any] has no attribute "setter"

Commenting out the _other method will fix the error.

[ilevkivskyi]

#1713 has another example and some ideas.

[levsa]

What is the status of this issue? #1713 is closed as duplicate of this issue.

[JukkaL]

We don't have immediate plans for fix this issue, but we are happy to receive a PR.

[levsa]

I had missed that moving the setter next to getter solves the problem, which is good enough. Thanks for the update!

[dacut]

This also affects subclasses that override properties, e.g.:

class Parent(object):
    @property
    def foo(self):
        return "parent_foo"

class Child(Parent):
    @Parent.foo.getter
    def foo(self):
        return "child_foo"

mypy returns a "Callable[[Any], Any]" has no attribute "getter" error here. In this case, it's obviously not possible to move the two methods to be next to each other.

[John15321]

This problem seems to be persistent and still confuses people a lot maybe it's time to fix it?

[samskiter]

This also affects subclasses that override properties, e.g.:

class Parent(object):
    @property
    def foo(self):
        return "parent_foo"

class Child(Parent):
    @Parent.foo.getter
    def foo(self):
        return "child_foo"

mypy returns a "Callable[[Any], Any]" has no attribute "getter" error here. In this case, it's obviously not possible to move the two methods to be next to each other.

Thanks for posting this - also struggling with this. Is there any known workaround? Specifically I wanted to override a property setter.

[asarkar]

"No attribute" along with "Untyped decorator" error.

class Cell(ABC):
    def __init__(self, value: int | None = None):
        ...

    @property
    def value(self) -> int | None:
        return self._value

class InputCell(Cell):
    @Cell.value.setter
    def value(self, value: int) -> None:
    	...

Running mypy with --strict generates:

react.py:28: error: "Callable[[Cell], int | None]" has no attribute "setter"  [attr-defined]
react.py:28: error: Untyped decorator makes function "value" untyped  [misc]

Line 28 happens to be the @Cell.value.setter.