this customize sort did not work ,what's wrong?

thinke365 thinke365 at gmail.com
Sat Jan 23 22:06:22 CET 2010


i mean the output i want is:
[ [1, 2], [1, 2, 3, 4], [1, 2, 3, 4, 5]], that is sort according to the
length of the list element

thinke365 wrote:
> 
> l = list()
> l1 = list((1, 2, 3, 4))
> l2 = list((1,2))
> l3 = list((1, 2, 3, 4, 5))
> l.append(l1)
> l.append(l2)
> l.append(l3)
> print l
> 
> def sort_by_list(E1, E2):
>     print len(E1), len(E2)
>     return len(list(E1)) > len(list(E2))
> 
> l.sort(cmp=sort_by_list)
> print l
> 
> output:
> [[1, 2, 3, 4], [1, 2], [1, 2, 3, 4, 5]]
> 2 4
> 5 2
> [[1, 2, 3, 4], [1, 2], [1, 2, 3, 4, 5]]
> 
> the order of the elements in the list did not change!
> 

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