Method __new__

Lib/test/test_descr.py:6021–6024

(mcls, name, bases, attrs)

    Sets default __doc__ and simplifies repr() output.
    """
    def __new__(mcls, name, bases, attrs):
        if attrs.get('__doc__') is None:
            attrs['__doc__'] = name  # helps when debugging with gdb
        return type.__new__(mcls, name, bases, attrs)
    def __repr__(cls):
        return repr(cls.__name__)