Method keys

crates/vm/src/builtins/mappingproxy.rs:152–155

(&self, vm: &VirtualMachine)

    #[pymethod]
    pub fn keys(&self, vm: &VirtualMachine) -> PyResult {
        let obj = self.to_object(vm)?;
        vm.call_method(&obj, identifier!(vm, keys).as_str(), ())
    }

    #[pymethod]
    pub fn values(&self, vm: &VirtualMachine) -> PyResult {