pairs from a list

Alan Isaac aisaac at american.edu
Tue Jan 22 17:10:53 CET 2008


Arnaud Delobelle wrote:
> According to the docs [1], izip is defined to be equivalent to:
> 
>      def izip(*iterables):
>          iterables = map(iter, iterables)
>          while iterables:
>              result = [it.next() for it in iterables]
>              yield tuple(result)
> 
> This guarantees that it.next() will be performed from left to right,
> so there is no risk that e.g. pairs4([1, 2, 3, 4]) returns [(2, 1),
> (4, 3)].
> 
> Is there anything else that I am overlooking?
> 
> [1] http://docs.python.org/lib/itertools-functions.html


<URL:http://bugs.python.org/issue1121416>

fwiw,
Alan Isaac



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