Message 308083 - Python tracker

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Author	srittau
Recipients	docs@python, srittau
Date	2017-12-12.00:34:34
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1513038875.1.0.213398074469.issue32284@psf.upfronthosting.co.za>
In-reply-to

Content
See https://github.com/python/typing/issues/518 for context. The typing documentation for 3.6.4rc1 states: > typing.io ... defines the generic type IO[AnyStr] and aliases TextIO and BinaryIO for respectively IO[str] and IO[bytes]. In the current implementation TextIO and BinaryIO are not aliases, but instead derived from IO. This means that values of type IO[...], and especially IO[Any] can not be assigned where TextIO or BinaryIO is expected.

See https://github.com/python/typing/issues/518 for context.

The typing documentation for 3.6.4rc1 states:

> typing.io ... defines the generic type IO[AnyStr] and aliases TextIO and BinaryIO for respectively IO[str] and IO[bytes].

In the current implementation TextIO and BinaryIO are not aliases, but instead derived from IO. This means that values of type IO[...], and especially IO[Any] can not be assigned where TextIO or BinaryIO is expected.

History
Date	User	Action	Args
2017-12-12 00:34:35	srittau	set	recipients: + srittau, docs@python
2017-12-12 00:34:35	srittau	set	messageid: <1513038875.1.0.213398074469.issue32284@psf.upfronthosting.co.za>
2017-12-12 00:34:35	srittau	link	issue32284 messages
2017-12-12 00:34:34	srittau	create