def distinct(self, key):
        """Get a list of distinct values for `key` among all documents
        in the result set of this query.

        Raises :class:`TypeError` if `key` is not an instance of
        :class:`basestring` (:class:`str` in python 3).

        The :meth:`distinct` method obeys the
        :attr:`~pymongo.collection.Collection.read_preference` of the
        :class:`~pymongo.collection.Collection` instance on which
        :meth:`~pymongo.collection.Collection.find` was called.

        :Parameters:
          - `key`: name of key for which we want to get the distinct values

        .. seealso:: :meth:`pymongo.collection.Collection.distinct`
        """
        options = {}
        if self.__spec:
            options["query"] = self.__spec
        if self.__max_time_ms is not None:
            options['maxTimeMS'] = self.__max_time_ms
        if self.__comment:
            options['$comment'] = self.__comment
        if self.__collation is not None:
            options['collation'] = self.__collation

        return self.__collection.distinct(key, **options)
Get a list of distinct values for `key` among all documents
        in the result set of this query.

        Raises :class:`TypeError` if `key` is not an instance of
        :class:`basestring` (:class:`str` in python 3).

        The :meth:`distinct` method obeys the
        :attr:`~pymongo.collection.Collection.read_preference` of the
        :class:`~pymongo.collection.Collection` instance on which
        :meth:`~pymongo.collection.Collection.find` was called.

        :Parameters:
          - `key`: name of key for which we want to get the distinct values

        .. seealso:: :meth:`pymongo.collection.Collection.distinct`