copy list, which way is best? /style

[Andreas Kuntzagk]

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