Python自定义一个类实现字典dict功能的方法

如下所示： import collections class Mydict(collections.UserDict): def __missing__(self, key): if isinstance(key, str): raise KeyError(key) return self[str(key)] def __contains__(self, key): return str(key) in self.data def __setitem__(self, key, item): self.data[str(key)] = i