[Patches] [ python-Patches-866594 ] heapq: A way to change the compare function

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Patches item #866594, was opened at 2003-12-28 05:06
Message generated for change (Settings changed) made by rhettinger
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Category: Library (Lib)
Group: Python 2.3
Status: Open
Resolution: None
Priority: 5
Submitted By: Miki Tebeka (tebeka)
>Assigned to: Raymond Hettinger (rhettinger)
Summary: heapq: A way to change the compare function

Initial Comment:
It'd be nice if heapq could use a custom compare function.
This way the user won't need to write a class with <=
method.

I've added set_cmp(cmp=None) for setting the
comparision function. Using cmp and not expliclty <=
makes later changes in implementation easier.

Attached are the diffs.

BTW: I know in CVS heapq is a C module now, don't have
the  time to change my patch...

Miki


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Comment By: Michael Chermside (mcherm)
Date: 2003-12-29 09:53

Message:
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Can you explain better the motivation for adding this? I don't 
find writing __le__() to be a significant problem normally, and 
setting the global _le seems a less-than-perfect design. What 
is a use case?

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