Method __missing__

Lib/test/test_dynamic.py:143–144

(self, key)

        # https://github.com/python/cpython/issues/91625
        class MyGlobals(dict):
            def __missing__(self, key):
                return int(key.removeprefix("_number_"))

        # Need more than 256 variables to use EXTENDED_ARGS
        variables = 400