cursor.py 文件源码

def rewind(self):
        """Rewind this cursor to its unevaluated state.

        Reset this cursor if it has been partially or completely evaluated.
        Any options that are present on the cursor will remain in effect.
        Future iterating performed on this cursor will cause new queries to
        be sent to the server, even if the resultant data has already been
        retrieved by this cursor.
        """
        self.__data = deque()
        self.__id = None
        self.__address = None
        self.__retrieved = 0
        self.__killed = False

        return self