On Sat, 22 Feb 2014 19:10:02 +1100, Chris Angelico wrote:

> On Sat, Feb 22, 2014 at 7:02 PM,  <wxjmfa...@gmail.com> wrote:
>>>>> # a swapping variant
>>>>> def swap(a, b):
>> ...     ab = [a, b]
>> ...     ab[1], ab[0] = ab[0], ab[1]
>> ...     return ab[0], ab[1]
> 
> Provably identical to:
> 
> def swap(a, b):
>     return b, a
> 
> The rest is just fluff.

You don't even need the function call.

a, b = b, a


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Steven
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