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']


Gary Herron
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