Why I think range is a wart.
tanzer at swing.co.at
Thu Mar 14 18:51:00 CET 2002
> > for index in range(len(mylist)):
> > <whatever>
> > and in the <whatever> body I need to make use of the indexes. I am not
> > sufficiently qualified to say if this is Pythonic or not, but I find
> > myself doing this quite often.
> It happens to me too, mostly when I'm using a sliding window
> type algorithm, that is, I need to look at two adjacent members
> of the list. You can't do this easily by iterating through the list;
> unrolling the first entry and the last entry are a pain.
I use a function pairwise to do such things:
for l, r in pairwise(mylist) :
Probably not as fast as index manipulation, but IMHO much easier to
Christian Tanzer tanzer at swing.co.at
Glasauergasse 32 Tel: +43 1 876 62 36
A-1130 Vienna, Austria Fax: +43 1 877 66 92
More information about the Python-list