Method tuple

mypy/test/testtypes.py:1113–1114

(self, *a: Type)

        assert is_subtype(t, result), f"{t} not subtype of {result}"

    def tuple(self, *a: Type) -> TupleType:
        return TupleType(list(a), self.fx.std_tuple)

    def var_tuple(self, t: Type) -> Instance:
        """Construct a variable-length tuple type"""