Re: [python] get all messages of a thread

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+       Thu, 02 Jun 2011 09:05:29 +0200\r
+From: Sebastian Spaeth <Sebastian@SSpaeth.de>\r
+To: Brian May <brian@microcomaustralia.com.au>,\r
+       Patrick Totzke <patricktotzke@googlemail.com>\r
+Subject: Re: [python] get all messages of a thread\r
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+Date: Thu, 02 Jun 2011 09:05:29 +0200\r
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+\r
+--=-=-=\r
+\r
+On Wed, 1 Jun 2011 15:35:35 +1000, Brian May wrote:\r
+> Oh, I see, for your code, there is a implied call to __len__, and the\r
+> __len__ function is completely broken for the reasons described in the\r
+> documentation:\r
+\r
+It seems to have been a bad idea to implement __len__ at all for the\r
+Messsages() construct in the python bindings, and I wonder if I should\r
+remove it.\r
+\r
+On the other hand, it seems that list(Messages()) implicitely calls\r
+len(), or so it seems from the error that we get when trying to list() a\r
+messages object.\r
+\r
+An alternative is to implement len() as a call to count_messages() which\r
+has for me so far always returned the correct number of messages without\r
+using up the iterator. However, the xapian docs explicitely state that\r
+it does not guarantee that the count will be correct, so len() might\r
+return a wrong message size (potentially).\r
+\r
+What would be the best way to solve this (besides fixing the C api to\r
+allow to reset the iterator ;-) ?)\r
+\r
+I could implement a custom .as_list() function that returns the\r
+Messages() object as a list that is guaranteed to be stable, by copying\r
+out the Message() objects into a list.\r
+\r
+Sebastian\r
+\r
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