Appending a list's elements to another list using a list comprehension

Bruno Desthuilliers bruno.42.desthuilliers at wtf.websiteburo.oops.com
Thu Oct 18 14:26:28 CEST 2007


Debajit Adhikary a écrit :
> I have two lists:
> 
> a = [1, 2, 3]
> b = [4, 5, 6]
> 
> What I'd like to do is append all of the elements of b at the end of
> a, so that a looks like:
> 
> a = [1, 2, 3, 4, 5, 6]
> 
> I can do this using
> 
> map(a.append, b)

And what about a.extend(b) ?

> How do I do this using a list comprehension?

Why would you want a list comp here ???

> (In general, is using a list comprehension preferable (or more
> "pythonic") as opposed to using map / filter etc.?)

Depends. Anyway, the pythonic solution here is to use the appropriate 
list method !-)




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