pairwise combination of two lists
gherron at islandtraining.com
Thu Aug 18 03:26:18 CEST 2011
On 08/17/2011 01:22 PM, Yingjie Lin wrote:
> Hi Python users,
> I have two lists:
> li1 = ['a', 'b']
> li2 = ['1', '2']
> and I wish to obtain a list like this
> li3 = ['a1', 'a2', 'b1', 'b2']
> Is there a handy and efficient function to do this, especially when li1 and li2 are long lists.
> I found zip() but it only gives [('a', '1'), ('b', '2')], not exactly what I am looking for.
> Thank you.
> - Yingjie
>>> li1 = ['a', 'b']
>>> li2 = ['1', '2']
>>> print [a+b for a in li1 for b in li2]
['a1', 'a2', 'b1', 'b2']
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