check_subset.py 文件源码

def check_identifier(self, name):
        assert isinstance(name, str), "An identifier must be a string: %r" % (name,)
        # Not a private, mangled name:
        # XXX also make sure there's no '.' inside (the compiler will add some sometimes)
        assert len(name) <= 2 or not name.startswith('__') or name.endswith('__'), \
            "Mangled private names are not supported: %r" % (name,)