Ammar Askar <am...@ammaraskar.com> added the comment:
Take a look at https://docs.python.org/3/faq/programming.html#why-am-i-getting-an-unboundlocalerror-when-the-variable-has-a-value What's happening is that because `a |= x` is treated as an assignment, i.e `a = a | x`. The compiler treats it as a local variable, but since it hasn't been initialized in inner() before it reaches `a |= set(["A"])` it fails with UnboundLocalError. ---------- nosy: +ammar2 resolution: -> not a bug stage: -> resolved status: open -> closed _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue39506> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
