+ _count_threads = nmlib.notmuch_query_count_threads
+ _count_threads.argtypes = [NotmuchQueryP]
+ _count_threads.restype = c_uint
+
+ def count_threads(self):
+ '''
+ This function performs a search and returns the number of
+ unique thread IDs in the matching messages. This is the same
+ as number of threads matching a search.
+
+ Note that this is a significantly heavier operation than
+ meth:`Query.count_messages`.
+
+ :returns: the number of threads returned by this query
+ :rtype: int
+ '''
+ self._assert_query_is_initialized()
+ return Query._count_threads(self._query)
+