Terry J. Reedy added the comment: I have doubts also.
The issue is the same for NotImplemented, though the occurrence is much rarer, and similar for Ellipsis. >>> NotImplemented.foo Traceback (most recent call last): File "<pyshell#19>", line 1, in <module> NotImplemented.foo AttributeError: 'NotImplementedType' object has no attribute 'foo' >>> Ellipsis.foo Traceback (most recent call last): File "<pyshell#20>", line 1, in <module> Ellipsis.foo AttributeError: 'ellipsis' object has no attribute 'foo' Replacing the type name with the object name works for this message, but not for the type errors. TypeError: unsupported operand type(s) for +: 'None' and 'int' is wrong. Replacing 'NoneType' with 'None' in error messages will break code that does something like "if 'NoneType' in err.args[0]" in an exception message. The same replacement would have to be make in user code. Fortunately, it would continue to work with older versions. ---------- nosy: +terry.reedy stage: -> test needed versions: +Python 3.7 -Python 3.6 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue28702> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com