Method cmp

crates/vm/src/stdlib/_collections.rs:536–551

(
            zelf: &Py<Self>,
            other: &PyObject,
            op: PyComparisonOp,
            vm: &VirtualMachine,
        )

    impl Comparable for PyDeque {
        fn cmp(
            zelf: &Py<Self>,
            other: &PyObject,
            op: PyComparisonOp,
            vm: &VirtualMachine,
        ) -> PyResult<PyComparisonValue> {
            if let Some(res) = op.identical_optimization(zelf, other) {
                return Ok(res.into());
            }
            let other = class_or_notimplemented!(Self, other);
            let lhs = zelf.borrow_deque();
            let rhs = other.borrow_deque();
            lhs.iter()
                .richcompare(rhs.iter(), op, vm)
                .map(PyComparisonValue::Implemented)
        }
    }

    impl Iterable for PyDeque {