models.py 文件源码

def __getattr__(self, name):
        global size_method_map
        if not size_method_map:
            init_size_method_map()
        di = size_method_map.get(name, None)
        if di is not None:
            result = curry(getattr(self, di['base_name']), di['size'])
            setattr(self, name, result)
            return result
        else:
            raise AttributeError