Stephen Paul Chappell added the comment: If my program needed to know if an object is iterable, it would be tempting to define and call the following function instead of using collections.abc.Iterable: def iterable(obj): try: iter(obj) except TypeError: return False return True Something tells me that is not what the author of collections.abc.Iterable intended. ---------- _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue18558> _______________________________________