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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 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)