dicts.py 文件源码

def sort(self,key):
        """
        This method modifies the sorting of the dictionary overriding the existing sort key.
        :param key: it can be a sequence containing all the keys already existing in the dictionary 
                    or a callable providing a sorting key algorithm.
        """
        import operator
        if operator.isCallable(key):
            self._keys = sorted(self._keys,key=key)
        else:
            for k in self._keys:
                if k not in self._keys: raise KeyError(k)
            self._keys = list(key)
        return self._keys[:]