From 01cc4a31155dc71643fce1b619778493c1ff0dd7 Mon Sep 17 00:00:00 2001 From: Sebastian Spaeth Date: Thu, 2 Jun 2011 16:28:00 +0200 Subject: [PATCH] bindings/python: implement Threads().__nonzero__ __nonzero__ checks if Threads() contains at least one more valid thread The existence of this function makes 'if Threads(): foo' work, as that previously implicitely called len() exhausting the iterator. This function makes `bool(Threads())` work repeatedly. For further info, see http://docs.python.org/reference/datamodel.html. Credits for the hint go to Brian May. Signed-off-by: Sebastian Spaeth --- bindings/python/notmuch/thread.py | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/bindings/python/notmuch/thread.py b/bindings/python/notmuch/thread.py index eebd6cb5..2bb30b70 100644 --- a/bindings/python/notmuch/thread.py +++ b/bindings/python/notmuch/thread.py @@ -141,7 +141,19 @@ class Threads(object): self._threads = None return i - + def __nonzero__(self): + """Check if :class:`Threads` contains at least one more valid thread + + The existence of this function makes 'if Threads: foo' work, as + that will implicitely call len() exhausting the iterator if + __nonzero__ does not exist. This function makes `bool(Threads())` + work repeatedly. + + :return: True if there is at least one more thread in the + Iterator, False if not. None on a "Out-of-memory" error. + """ + return self._threads is not None and \ + nmlib.notmuch_threads_valid(self._threads) > 0 def __del__(self): """Close and free the notmuch Threads""" -- 2.43.0