code: def rewind(self):
          
          self.__data = deque()
          self.__id = None
          self.__address = None
          self.__retrieved = 0
          self.__killed = False
  
          return self
docs: 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.