New submission from Jakub Stasiak <jakub+python....@stasiak.at>: Excerpt from the documentation:
"""This is a straightforward interface to the Unix select() system call. The first three arguments are sequences of ‘waitable objects’: either integers representing file descriptors or objects with a parameterless method named fileno() returning such an integer:""" In reality it accepts for example dictionary key views (that's how I discovered it) due to its internal usage of PySequence_Fast, which (from https://docs.python.org/3/c-api/sequence.html#c.PySequence_Fast): """Return the sequence or iterable o as an object usable by the other PySequence_Fast* family of functions. If the object is not a sequence or iterable, raises TypeError with m as the message text. Returns NULL on failure.""" I made a pull request to document this behavior in select (https://github.com/python/cpython/pull/16832) but it was recommended that I create this issue because the solution may not be obvious here. ---------- components: Library (Lib) messages: 355325 nosy: corona10, jstasiak priority: normal pull_requests: 16447 severity: normal status: open title: select()'s documentation claims only sequences are accepted, but it allows all iterables type: behavior versions: Python 3.5, Python 3.6, Python 3.7, Python 3.8, Python 3.9 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue38580> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
