René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"TextIO/BinaryIO: Mismatch between documentation and implementation","articleBody":"The [typing documentation](https://docs.python.org/3/library/typing.html) for 3.6.4rc1 at states:\r\n\r\n\u003e This (`typing.io`) defines the generic type `IO[AnyStr]` and aliases `TextIO` and `BinaryIO` for respectively `IO[str]` and `IO[bytes]`.\r\n\r\nIn the current implementation `TextIO` and `BinaryIO` are not aliases, but instead derived from `IO`. I am not sure whether this is a documentation or implementation problem, but the current implementation causes problems, since values of type `IO[...]`, and especially `IO[Any]` can not be assigned where `TextIO` or `BinaryIO` is expected.\r\n\r\nSee python/typeshed#1780 for a real-world example.\r\n","author":{"url":"https://github.com/srittau","@type":"Person","name":"srittau"},"datePublished":"2017-12-11T23:41:18.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/518/typing/issues/518"}