Method __len__

flow-message/src/cross/python/map.rs:16–18

(&self)

#[pyproto]
impl PyMappingProtocol for PyMap {
    fn __len__(&self) -> usize {
        self.as_ref().len()
    }
    fn __setitem__(&mut self, attr: String, value: PyObject) -> PyResult<()> {
        let gil = Python::acquire_gil();
        let py = gil.python();