Function delitem

tests/test_class.rs:694–702

()

#[test]
fn delitem() {
    let gil = Python::acquire_gil();
    let py = gil.python();

    let c = DelItem::create_instance(py, Cell::new(0)).unwrap();
    py_run!(py, c, "del c[1]");
    assert_eq!(c.key(py).get(), 1);
    py_expect_exception!(py, c, "c[1] = 2", NotImplementedError);
}

py_class!(class SetDelItem |py| {
    data val: Cell<Option<i32>>;