Incrementing a string
velman at cox.net
Thu Sep 16 00:08:20 CEST 2004
I've used perl for a lot of 'throw away' scripts; I like Python better in
principle, from reading about it, but it was always easier to just use
perl rather than learn python.
Now I'm writing a smallish program that I expect to keep around, so am
taking this opportunity to try to learn some Python. I have a need for
computer generated set of simple string lables. I don't know how many in
advance---each is produced as a result of a user action.
In perl I simply initiated
Then, after using it doing
This conveniently steps through the alphabet, then goes on to aa, ab,ac,
In Python I can get from a to z with a generator as so:
>>> def gen_alph():
... for i in range(97,123):
... yield chr(i)
>>> g = gen_alph()
But it looks like going beyond z to aa and so on is (relatively) complicated.
In truth, it seems unlikely that I would ever go beyond z in using my
application, and certainly not beyond zz which wouldn't be too hard to
program. But I hate to build in limitations no matter how reasonable.
It seems like there should be a better way that I'm missing because I'm
thinking in perl, not thinking in Python. :-)
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