Message 335674 - Python tracker

Message335674

Author	thehesiod
Recipients	thehesiod
Date	2019-02-16.08:04:16
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1550304256.68.0.492420733825.issue36009@roundup.psfhosted.org>
In-reply-to

Content
For valid types which encapsulate other types, like typing.List or typing.Tuple, you can declare what's contained in them like so: foo: typing.List[int] = [] Unfortunately weakref.ReferenceType does not allow you to do this. You get the error: >>> foo: weakref.ReferenceType[typing.Any] = None Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: 'type' object is not subscriptable so either ReferenceType should be fixed or a new type made available.

Content

For valid types which encapsulate other types, like typing.List or typing.Tuple, you can declare what's contained in them like so:

foo: typing.List[int] = []

Unfortunately weakref.ReferenceType does not allow you to do this.  You get the error:
>>> foo: weakref.ReferenceType[typing.Any] = None
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'type' object is not subscriptable

so either ReferenceType should be fixed or a new type made available.

History
Date	User	Action	Args
2019-02-16 08:04:16	thehesiod	set	recipients: + thehesiod
2019-02-16 08:04:16	thehesiod	set	messageid: <1550304256.68.0.492420733825.issue36009@roundup.psfhosted.org>
2019-02-16 08:04:16	thehesiod	link	issue36009 messages
2019-02-16 08:04:16	thehesiod	create