Bugs item #1221477, was opened at 2005-06-15 12:46
Message generated for change (Comment added) made by agthorr
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Category: Documentation
Group: None
Status: Closed
Resolution: Invalid
Priority: 5
Submitted By: Daniel Stutzbach (agthorr)
Assigned to: Nobody/Anonymous (nobody)
Summary: Incorrect documentation for InPlace Number operators

Initial Comment:
The documentation for the various InPlace abstract
number operators (PyNumber_InPlaceSubtract, etc.)
specify that the functions return a new reference. 
Unless I'm mistaken, this is incorrect.  The functions
do not increment increment the reference counter.  



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>Comment By: Daniel Stutzbach (agthorr)
Date: 2005-06-15 14:29

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How are the InPlace versions different from the regular
versions, then?

I do remember something about number objects in Python being
immutable, so what you say makes sense.  I'm just not sure
if I need to be decrementing any reference counters when I'm
trying to do the equivalent of "a += b".

Perhaps adding some text to the top of that section
describing what "in-place" means in this context?

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Comment By: Raymond Hettinger (rhettinger)
Date: 2005-06-15 14:15

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Actually, they do.  Arithmetic operations create new number
objects.

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