Colin J. Williams wrote:
<div class="moz-text-flowed" style="font-family: -moz-fixed">Steven
D'Aprano wrote:
On Fri, 14 Aug 2009 15:54:54 +0000, Alan G Isaac wrote:
`lst` is a nested list
`tpl` is the indexes for an item in the list
What is the nice way to retrieve the item? (Speedy access is nice.)
Assuming you want to do this frequently, write a helper function,
then use it:
# Untested
def extract(nested, indexes):
for index in indexes:
nested = nested[index]
return nested
This looks OK for the first level of nesting. We are not told much
about tpl but suppose that:
lst= [a, [b, [c, d]], [e, f]] and that we wish to retrieve d and f
from lst. tpl would need to be something like [[1, 1, 1], [2, 1]].
If that is the requirement, then Untested is only a step along the
road, extract could be made recursive.
Colin W.
<snip>
You missed the point: he's retrieving *an* item from a list that's
nested arbitrarily. Each item in the tpl (tuple) is a simple integer.
DaveA
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