Function get_required 

pub fn get_required<T>(dict: &Bound<'_, PyDict>, key: &str) -> PyResult<T>
where
    T: for<'a, 'py> FromPyObject<'a, 'py>,
    for<'a, 'py> PyErr: From<<T as FromPyObject<'a, 'py>>::Error>,

Helper function to get a required value from a Python dictionary and extract it.

Returns

Returns the extracted value or a PyErr if the key is missing or extraction fails.

Errors

Returns PyErr if the key is missing or value extraction fails.