[Tutor] Recursively flatten the list
davea at ieee.org
Sat Mar 26 12:47:40 CET 2011
On 01/-10/-28163 02:59 PM, Prasad, Ramit wrote:"
>A more important problem is that it is flattening only one level.
>Multi-level flattening is I think not possible without using some kind
>Not true, just requires more iterations to check each element. Each
>iteration could check if every element is a list and then unpack if it
>is a list. When you finally have an iteration that has no lists, you
>can end the loop.
>Not time efficient or pretty but it would certainly work without
>recursion. I am sure people on this list can provide a better answer
>than I can :)
Indeed, something like the following would suffice, in one "pass".
index = 0
while index < len(mylist):
if isinstance(mylist[index), list):
mylist[index:index+1] = mylist[index]
else index += 1
More information about the Tutor