retrieve item from nested list given index tuple

Alan G Isaac alan.isaac at gmail.com
Fri Aug 14 17:54:54 CEST 2009


`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.)

I don't want to use NumPy, but I'd like somehow
to avoid an explicit loop.  I did consider using
eval.  E.g., eval('lst' + '[%d]'*len(tpl)%tpl).
It works but seems rather ugly.  I kind of like
reduce(list.__getitem__, tpl, lst) but the
reliance on reduce remains controversial enough
to see i removed from the Python 3 built-ins ...

Thanks,
Alan Isaac



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