Serhiy Storchaka added the comment: > The doc does not specify that 'length' cannot be non-negative.
It does. https://docs.python.org/3/reference/datamodel.html#object.__len__ .. method:: object.__len__(self) Called to implement the built-in function :func:`len`. Should return the length of the object, an integer ``>=`` 0. ---------- resolution: -> fixed stage: patch review -> resolved status: open -> closed _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue29839> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
