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Gmane
From: Ram Rachum <ram <at> rachum.com>
Subject: Re: Self containment
Newsgroups: gmane.comp.python.israel
Date: Monday 14th November 2011 00:23:53 UTC (over 6 years ago)
I'm also curious to know whether you stumbled upon this while trying to do
something pragmatic, or just trying to tear Python apart for fun :)

On Mon, Nov 14, 2011 at 2:16 AM, Ram Rachum  wrote:

> Very interesting Rani!
>
> I investigated this by making a replacement of the `len` function and
> putting breakpoints inside of it.
>
> The answer: When you call `list.sort`, it first empties the list, and
then
> starts measuring the length of the items for sorting. So when measuring
the
> list itself, it gets a result of 0 because the list has been emptied.
>
> The question is: Is there a good reason for Python behaving like that?
>
>
> Ram.
>
> On Mon, Nov 14, 2011 at 2:01 AM, Rani Hod  wrote:
>
>> Dear Abby,
>>
>> Any idea why sorted and list.sort behave differently in the following
>> example?
>> (specifically, why x is not sorted in the end?)
>>
>> Thanks,
>> R.
>>
>> ------------8<--------------------8<--------
>> >>> x = ['one','two','three']; x.append(x)
>> >>> sorted(x, key=len)
>> ['one', 'two', ['one', 'two', 'three', [...]], 'three']
>> >>> x.sort(key=len); x
>> [[...], 'one', 'two', 'three']
>> ------------8<--------------------8<--------
>>
>> _______________________________________________
>> Python-il mailing list
>> [email protected]
>> http://hamakor.org.il/cgi-bin/mailman/listinfo/python-il
>>
>>
>
 
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