On 2018-12-27, Daniel Ojalvo via Python-list <python-list@python.org> wrote:

>>>> open("this_is_a_pipe")
><blocks>

Opening a tty device can also block[1].  However, if somebody is using
the open() builtin on tty devices that's probably the least of their
problems.

[1] Technically, opening any character-mode device could block --
    serial ports are the only "common" example I can think of.

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