Thomas Jollans wrote:
On 07/11/2010 05:59 PM, dhruvbird wrote:
Why doesn't python's list append() method return the list itself? For
that matter, even the reverse() and sort() methods?
I found this link (http://code.google.com/edu/languages/google-python-
class/lists.html) which suggests that this is done to make sure that
the programmer understands that the list is being modified in place,
Yes!
but that rules out constructs like:
([1,2,3,4].reverse()+[[]]).reverse()
No!
you can either approach this by imperatively modifying a list in-place:
L = [1,2,3,4]
L.reverse()
L.append([])
L.reverse()
[snip]
If you want to prepend an empty list in-place, use the .insert method:
L = [1,2,3,4]
L.insert(0, [])
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