can't sort

[Tim Heaney]

Helmut Jarausch <jarausch at skynet.be> writes:
> 
> Why does
> 
> print [4,1,3,2].sort()
> 
> just print
> None
> ?
> 
> As far as I understood the docs 'sort'
> should take 'cmp' for comparisons which is
> well defined for integers.

It does the sort as you expect, but it does so in place. It does not
return the sorted list. Thus print has nothing to print.

  $ python -c 'a = [4,1,3,2]; b = a.sort(); print "a =",a; print "b =",b'
  a = [1, 2, 3, 4]
  b = None

I hope this helps,

Tim