Serhiy Storchaka added the comment: Builtin open() in Python 3 (and io.open() in Python 2.7) accept unicode strings, byte strings and integers as the first arguments (general path-like objects also are supported in Python 3.6, but it doesn't matter). bool is a subtype of int, and False is equal to integer 0. 0 is a file descriptor of sys.stdin.
>>> import sys >>> sys.stdin.fileno() 0 Thus open(False) is equivalent to open(sys.stdin.fileno()). It creates a file object that wraps the file descriptor 0. This is legitimate operation. ---------- resolution: -> not a bug stage: -> resolved status: open -> closed _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue29297> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
