Guido van Rossum added the comment: Thanks, let's roll it back.
The reason it never was an issue for old-style classes is that they behaved like this from the start, so nobody wrote tests that depended on the predictability of repr(). But new-style classes have had this nice clean repr() since they were introduced (in 2.3?) so it's unsurprising that this is now depended upon. Here's a link to some test code for mypy that broke: https://github.com/python/mypy/blob/master/mypy/util.py#L22-L23 It may be irreprehensible code but it works for Python 3.2-3.5 (and for new-style classes in Python 2, except mypy requires Python 3), and broke in 3.6. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue25548> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com