sorting list of complex numbers

[Steve Holden]

Thomas Bellman wrote:
> Steve Holden <steve at holdenweb.com> wrote:
> 
>> Only half the number, of course. The advantage of the key function is
>> that each element requires only one call out to a Python function, and
>> the comparisons then take place using a C-coded comparison function.
> 
> You don't need any Python-coded function at all.  The operator
> module is your friend: key=operator.attrgetter('real', 'imag')
> will create the required tuples for sorting.
> 
True; "requires only one call out to the key function", then. You're
right, attrgetter will be faster still, and it's a really neat solution.

regards
 Steve
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