Message416853
| Author |
eric.smith |
| Recipients |
AlexWaygood, Germandrummer92, JelleZijlstra, eric.smith, gvanrossum, kj |
| Date |
2022年04月06日.10:36:45 |
| SpamBayes Score |
-1.0 |
| Marked as misclassified |
Yes |
| Message-id |
<1649241405.12.0.115559104476.issue47237@roundup.psfhosted.org> |
| In-reply-to |
| Content |
Here's the error without dataclasses:
------
from typing import Protocol
class SomeProtocol(Protocol):
@property
def some_value(self) -> str: ...
class SomeClass(SomeProtocol):
def __init__(self, some_value):
self.some_value = some_value
if __name__ == '__main__':
a = SomeClass(some_value="value")
------
Traceback (most recent call last):
File "foo.py", line 12, in <module>
a = SomeClass(some_value="value")
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "foo.py", line 9, in __init__
self.some_value = some_value
^^^^^^^^^^^^^^^
AttributeError: property 'some_value' of 'SomeClass' object has no setter
And here it is without Protocol:
--------
class SomeProperty:
@property
def some_value(self) -> str: ...
class SomeClass(SomeProperty):
def __init__(self, some_value):
self.some_value = some_value
if __name__ == '__main__':
a = SomeClass(some_value="value")
--------
Traceback (most recent call last):
File "foo.py", line 10, in <module>
a = SomeClass(some_value="value")
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "foo.py", line 7, in __init__
self.some_value = some_value
^^^^^^^^^^^^^^^
AttributeError: property 'some_value' of 'SomeClass' object has no setter |
|