From: Brian May <brian@microcomaustralia.com.au>
To: Patrick Totzke <patricktotzke@googlemail.com>
Cc: notmuch <notmuch@notmuchmail.org>
Subject: Re: [python] get all messages of a thread
Date: Wed, 1 Jun 2011 15:35:35 +1000 [thread overview]
Message-ID: <BANLkTikEJ9dJ5kLg2QJQ+egHg2sh7S1wiA@mail.gmail.com> (raw)
In-Reply-To: <1306588052-sup-9838@brick>
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On 28 May 2011 23:18, Patrick Totzke <patricktotzke@googlemail.com> wrote:
> if r: #because we cant iterate on NoneType
>
I don't understand why, but this line sets r._msgs to None. So it crashes,
because it has no message ids to look for.
If you change it to
if r is not None:
... then it works for me.
Oh, I see, for your code, there is a implied call to __len__, and the
__len__ function is completely broken for the reasons described in the
documentation:
.. note:: As this iterates over the messages, we will not be able to=
iterate over them again! So this will fail::
#THIS FAILS
msgs = Database().create_query('').search_message()
if len(msgs) > 0: #this 'exhausts' msgs
# next line raises
NotmuchError(STATUS.NOT_INITIALIZED)!!!
for msg in msgs: print msg
Most of the time, using the
:meth:`Query.count_messages` is therefore more
appropriate (and much faster). While not guaranteeing
that it will return the exact same number than len(),
in my tests it effectively always did so.
--
Brian May <brian@microcomaustralia.com.au>
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next prev parent reply other threads:[~2011-06-01 5:35 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-28 13:18 [python] get all messages of a thread Patrick Totzke
2011-05-31 23:48 ` Carl Worth
2011-06-01 5:35 ` Brian May [this message]
2011-06-02 7:05 ` Sebastian Spaeth
2011-06-02 9:43 ` Brian May
2011-06-02 14:20 ` Sebastian Spaeth
2011-06-02 14:37 ` Sebastian Spaeth
2011-06-02 14:38 ` Austin Clements
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