Method cmp

crates/vm/src/builtins/object.rs:319–346

(
        zelf: &PyObject,
        other: &PyObject,
        op: PyComparisonOp,
        vm: &VirtualMachine,
    )

    #[inline(always)]
    fn cmp(
        zelf: &PyObject,
        other: &PyObject,
        op: PyComparisonOp,
        vm: &VirtualMachine,
    ) -> PyResult<PyComparisonValue> {
        let res = match op {
            PyComparisonOp::Eq => {
                if zelf.is(other) {
                    PyComparisonValue::Implemented(true)
                } else {
                    PyComparisonValue::NotImplemented
                }
            }
            PyComparisonOp::Ne => {
                let cmp = zelf.class().slots.richcompare.load().unwrap();
                let value = match cmp(zelf, other, PyComparisonOp::Eq, vm)? {
                    Either::A(obj) => PyArithmeticValue::from_object(vm, obj)
                        .map(|obj| obj.try_to_bool(vm))
                        .transpose()?,
                    Either::B(value) => value,
                };
                value.map(|v| !v)
            }
            _ => PyComparisonValue::NotImplemented,
        };
        Ok(res)
    }

    /// Implement setattr(self, name, value).
    #[pymethod]