function for counting items in a sequence

[Steven Bethard]

Alex Martelli wrote:

If we had a "turn sequence into bag" function somewhere
(and it might be worth having it for other reasons):

def bagit(seq):
import collections
d = collections.defaultdict(int)
for x in seq: d[x] += 1
return d

I use this function all the time -- I call it dicttools.count(). I'd
love to see this appear in the collections module or somewhere else in
the stdlib.

STeVe

[Alex Martelli]

Steven Bethard <st************@gmail.comwrote:

Alex Martelli wrote:

If we had a "turn sequence into bag" function somewhere
(and it might be worth having it for other reasons):
>
def bagit(seq):
import collections
d = collections.defaultdict(int)
for x in seq: d[x] += 1
return d

I use this function all the time -- I call it dicttools.count(). I'd
love to see this appear in the collections module or somewhere else in
the stdlib.

Maybe you should propose it in python-dev -- it does seem a reasonable
utility addition to the collections module, after all.
Alex