Method __sub__

crates/vm/src/builtins/set.rs:624–638

(
        &self,
        other: PyObjectRef,
        vm: &VirtualMachine,
    )

    }

    fn __sub__(
        &self,
        other: PyObjectRef,
        vm: &VirtualMachine,
    ) -> PyResult<PyArithmeticValue<Self>> {
        if let Ok(other) = AnySet::try_from_object(vm, other) {
            Ok(PyArithmeticValue::Implemented(self.op(
                other,
                PySetInner::difference,
                vm,
            )?))
        } else {
            Ok(PyArithmeticValue::NotImplemented)
        }
    }

    fn __rsub__(
        zelf: PyRef<Self>,