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author | Sebastian Spaeth <Sebastian@SSpaeth.de> | 2011-06-02 16:28:00 +0200 |
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committer | Sebastian Spaeth <Sebastian@SSpaeth.de> | 2011-06-02 16:28:00 +0200 |
commit | 01cc4a31155dc71643fce1b619778493c1ff0dd7 (patch) | |
tree | b8847a55041cb6939dde49ac5b7738b7e98e0b09 /bindings/python/notmuch/thread.py | |
parent | 4d406d9c252e707477a1cc744c4ee74bde4d1c3c (diff) |
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 <Sebastian@SSpaeth.de>
Diffstat (limited to 'bindings/python/notmuch/thread.py')
-rw-r--r-- | bindings/python/notmuch/thread.py | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/bindings/python/notmuch/thread.py b/bindings/python/notmuch/thread.py index eebd6cb..2bb30b7 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""" |