[ python-Bugs-1696199 ] Add collections.counts()

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Bugs item #1696199, was opened at 2007-04-07 17:38
Message generated for change (Comment added) made by gvanrossum
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Category: Python Library
Group: Python 2.6
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Steven Bethard (bediviere)
Assigned to: Nobody/Anonymous (nobody)
Summary: Add collections.counts()

Initial Comment:
As suggested in http://mail.python.org/pipermail/python-list/2007-April/433986.html this is a patch to add a counts() function to the collections module. Usage looks like:

>>> items = 'acabbacba'
>>> item_counts = counts(items)
>>> for item in 'abcd':
...     print item, item_counts[item]
...
a 4
b 3
c 2
d 0

Yes, it's only a 4-line function, but it's a frequently re-written 4-line function.

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>Comment By: Guido van Rossum (gvanrossum)
Date: 2007-04-07 19:39

Message:
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Does it have to be a defaultdict?  I.e. is it important that
item_counts['d'] not raise KeyError?

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