Miguel added the comment: Your proposal also makes an extra computation: an item (not) belongs to a list
if not self._w in cmd: cmd = _flatten((self._w, cmd)) Also it's more efficient to use this than the function _flaten() in that situation: if not self._w in cmd: cmd = (self._w,) + cmd ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue28498> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com