Function type_check

crates/vm/src/stdlib/typevar.rs:17–24

(arg: PyObjectRef, msg: &str, vm: &VirtualMachine)

    };

    fn type_check(arg: PyObjectRef, msg: &str, vm: &VirtualMachine) -> PyResult<PyObjectRef> {
        // Calling typing.py here leads to bootstrapping problems
        if vm.is_none(&arg) {
            return Ok(arg.class().to_owned().into());
        }
        let message_str: PyObjectRef = vm.ctx.new_str(msg).into();
        call_typing_func_object(vm, "_type_check", (arg, message_str))
    }

    fn variance_repr(
        name: &str,