New submission from Ilia Korvigo:
I've got conflicts between Python's typing system and `__slots__`. Here is a
small reproducible example.
from typing import TypeVar, Generic, Sequence
T = TypeVar("T")
class TestGeneric(Sequence, Generic[T]):
__slots__ = ("test",)
def __init__(self, test: T):
self.test = [test]
def __iter__(self):
return iter(self.test)
def __len__(self):
return len(self.test)
def __contains__(self, item):
return item in self.test
def __getitem__(self, _):
return self.test[0]
Now whenever I try to specify a content type, e.g.
V = TestGeneric[int]
I get
ValueError: 'test' in __slots__ conflicts with class variable
I use `Generics` in classes without slots a lot, hence I think this error has
to be linked to `__slots__`. Moreover, the same class works fine, if you remove
the `__slots__`
--
components: Library (Lib)
messages: 300797
nosy: grayfall
priority: normal
severity: normal
status: open
title: typing module conflicts with __slots__-classes
type: behavior
versions: Python 3.5
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<http://bugs.python.org/issue31272>
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