def _make_proxy_property ( bind_attr , attr_name ) : def proxy_property ( self ) : """
        proxy
        """ bind = getattr ( self , bind_attr ) return getattr ( bind , attr_name ) return property ( proxy_property )
python how to modify mappingproxy
def _make_proxy_property(bind_attr, attr_name):
    def proxy_property(self):
        """
        proxy
        """
        bind = getattr(self, bind_attr)
        return getattr(bind, attr_name)
    return property(proxy_property)