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Date: Thu, 2 Jun 2011 19:43:29 +1000
Message-ID: <BANLkTi=df3+LBWasFic9ZNrKaLGA7Bmdew@mail.gmail.com>
Subject: Re: [python] get all messages of a thread
From: Brian May <brian@microcomaustralia.com.au>
To: notmuch <notmuch@notmuchmail.org>
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On 2 June 2011 17:05, Sebastian Spaeth <Sebastian@sspaeth.de> wrote:

> What would be the best way to solve this (besides fixing the C api to
> allow to reset the iterator ;-) ?)
>
>
 I am not really familiar with the code. So am I correct in making the
following assumptions?

* It is not easy to fix the C api to reset the iterator (what about
repeating the search?)

* The only accurate way to get the number of messages is to iterate through
every search result and count them?

If so, then len(...) I think might be very slow if there are a large number
of elements.

Maybe it might be easier/better to implement object.__nonzero__(self)
 instead of the object.__len__(self) method?

http://docs.python.org/reference/datamodel.html

object.__nonzero__(self)
Called to implement truth value testing and the built-in operation bool();
should return False or True, or their integer equivalents 0 or 1. When this
method is not defined, __len__() is called, if it is defined, and the objec=
t
is considered true if its result is nonzero. If a class defines neither
__len__() nor __nonzero__(), all its instances are considered true.

object.__len__(self)
Called to implement the built-in function len(). Should return the length o=
f
the object, an integer >=3D 0. Also, an object that doesn=92t define a
__nonzero__() method and whose __len__() method returns zero is considered
to be false in a Boolean context.

--=20
Brian May <brian@microcomaustralia.com.au>

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<div class=3D"gmail_quote">On 2 June 2011 17:05, Sebastian Spaeth <span dir=
=3D"ltr">&lt;<a href=3D"mailto:Sebastian@sspaeth.de">Sebastian@sspaeth.de</=
a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0=
 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div class=3D"im">What would be the best way to solve this (besides fixing =
the C api to</div>
allow to reset the iterator ;-) ?)<br><br></blockquote><div><br></div><div>=
=A0I am not really familiar with the code. So am I correct in making the fo=
llowing assumptions?</div><div><br></div><div>* It is not easy to fix the C=
 api to reset the iterator (what about repeating the search?)</div>
<div><br></div><div>* The only accurate way to get the number of messages i=
s to iterate through every search result and count them?</div><div><br></di=
v><div>If so, then len(...) I think might be very slow if there are a large=
 number of elements.</div>
<div><br></div><div>Maybe it might be easier/better to implement=A0object._=
_nonzero__(self) =A0instead of the object.__len__(self) method?</div><div><=
br></div><div><a href=3D"http://docs.python.org/reference/datamodel.html">h=
ttp://docs.python.org/reference/datamodel.html</a></div>
<div><br></div><div><div>object.__nonzero__(self)</div><div>Called to imple=
ment truth value testing and the built-in operation bool(); should return F=
alse or True, or their integer equivalents 0 or 1. When this method is not =
defined, __len__() is called, if it is defined, and the object is considere=
d true if its result is nonzero. If a class defines neither __len__() nor _=
_nonzero__(), all its instances are considered true.</div>
<div><br></div><div><div>object.__len__(self)</div><div>Called to implement=
 the built-in function len(). Should return the length of the object, an in=
teger &gt;=3D 0. Also, an object that doesn=92t define a __nonzero__() meth=
od and whose __len__() method returns zero is considered to be false in a B=
oolean context.</div>
</div></div><div><br></div></div>-- <br>Brian May &lt;<a href=3D"mailto:bri=
an@microcomaustralia.com.au">brian@microcomaustralia.com.au</a>&gt;<br>

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