New submission from Matt Chaput:
If I try to pickle and unpickle an object of a class that has specialized a
generic superclass, when I try to unpickle I get this error:
TypeError: descriptor '__dict__' for 'A' objects doesn't apply to 'B' object
Test case:
from typing import Generic, TypeVar
import pickle
T = TypeVar("T")
class A(Generic[T]):
def __init__(self, x: T):
self.x = x
class B(A[str]):
def __init__(self, x: str):
self.x = x
b = B("hello")
z = pickle.dumps(b)
print(z)
_ = pickle.loads(z)
----------
messages: 253421
nosy: maatt
priority: normal
severity: normal
status: open
title: Typing: Specialized subclasses of generics cannot be unpickled
versions: Python 3.5
_______________________________________
Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue25472>
_______________________________________
_______________________________________________
Python-bugs-list mailing list
Unsubscribe:
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
