tallying occurrences in list

[Paul Rubin]

kj <no.email at please.post> writes:
> 1. is there a standard name for it?

I don't know of one, or a stdlib for it, but it's pretty trivial.

> def tally(c):
>     t = dict()
>     for x in c:
>         t[x] = t.get(x, 0) + 1
>     return sorted(t.items(), key=lambda x: (-x[1], x[0]))

I like to use defaultdict and tuple unpacking for code like that:

 from collections import defaultdict
 def tally(c):
     t = defaultdict(int)
     for x in c:
         t[x] += 1
     return sorted(t.iteritems(), key=lambda (k,v): (-v, k))