Method __getstate__

crates/vm/src/stdlib/_io.rs:3824–3826

(zelf: PyObjectRef, vm: &VirtualMachine)

        #[pymethod]
        fn __getstate__(zelf: PyObjectRef, vm: &VirtualMachine) -> PyResult {
            Err(vm.new_type_error(format!("cannot pickle '{}' instances", zelf.class().name())))
        }

        #[pymethod]
        fn __reduce_ex__(zelf: PyObjectRef, proto: usize, vm: &VirtualMachine) -> PyResult {