New submission from Caleb Donovick <donov...@cs.stanford.edu>:
OS:
Debian testing
python3 -VV:
Python 3.7.2+ (default, Feb 2 2019, 14:31:48)
[gcc 8.2.0]
The following:
```
class Meta(type): pass
class X(metaclass=Meta):
def __class_getitem__(cls, key):
return key
X[10]
```
Results in
```
TypeError: 'Meta' object does not support indexing
```
However, PEP 560 specifically states that __class_getitem__ should be used as
fall back for when a metaclass does not implement __getitem__.
----------
assignee: docs@python
components: Documentation, Interpreter Core
messages: 335497
nosy: Donovick, docs@python
priority: normal
severity: normal
status: open
title: Metaclasses interfere with __class_getitem__
type: behavior
versions: Python 3.7
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue35992>
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