copy list, which way is best? /style

[Andrew Wilkinson]

Andreas Kuntzagk wrote:

> Hi,
> 
> There are three ways to (shallow)copy a list l I'm aware of:
> 
>>>> l2=list(l)
>>>> l2=l[:]
>>>> l2.copy.copy(l)
> 
> Are there any differences? Are there more (reasonable) ways?
> I think the first is the most pythonic, second looks more like this other
> p-language and third requires an import, so I would prefer the first.
> Do you agree?
> 
> Andreas

The way I'd do it is 

from copy import copy
l2 = copy(l1)

or

from copy import deepcopy
l2 = deepcopy(l1)

I don't know what the difference is, if any, but I think this way is more
readable.

HTH,
Andrew Wilkinson

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