20-08-2009 o 13:01:29 Neal Becker <ndbeck...@gmail.com> wrote:

I meant #occurrences of characters from the set A in string B

But:

1) separately for each element of A? (see Simon's sollution with
defaultdict)

2) or total number of all occurrences of elements of A? (see below)


20-08-2009 o 14:05:12 Peter Otten <__pete...@web.de> wrote:

identity = "".join(map(chr, range(256)))
n = len(b) - len(b.translate(identity, a))

Nice, though I'd prefer Simon's sollution:

    a = set(a)
    n = sum(item in a for item in b)

Regards,
*j

--
Jan Kaliszewski (zuo) <z...@chopin.edu.pl>
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