Method report_non_method_protocol

mypy/messages.py:2118–2127

(
        self, tp: TypeInfo, members: list[str], context: Context
    )

        self.fail(f"Cannot use {method_name}() with {type_name} type", context)

    def report_non_method_protocol(
        self, tp: TypeInfo, members: list[str], context: Context
    ) -> None:
        self.fail(
            "Only protocols that don't have non-method members can be used with issubclass()",
            context,
        )
        if len(members) < 3:
            attrs = ", ".join(members)
            self.note(f'Protocol "{tp.name}" has non-method member(s): {attrs}', context)

    def note_call(
        self, subtype: Type, call: Type, context: Context, *, code: ErrorCode | None