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| From | Kev Dwyer <kevin.p.dwyer@gmail.com> |
| Subject | Re: pairwise combination of two lists |
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| Date | Wed, 17 Aug 2011 22:33:34 +0100 |
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Followups directed to: gmane.comp.python.general
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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
Hello Yingjie,
This isn't exactly handy, but...
>>> import itertools
>>> a = ('a', 'b')
>>> b = (1, 2)
>>> [x + str(y) for (x, y) in itertools.product(*(a, b))]
['a1', 'a2', 'b1', 'b2']
Cheers,
Kev
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Re: pairwise combination of two lists Kev Dwyer <kevin.p.dwyer@gmail.com> - 2011-08-17 22:33 +0100
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