Bryan Olson wrote:
> Duncan Booth wrote:
>
>> Here's the way I would do it:
>>
>>>>> def occurrences(it):
>>
>>
>> res = {}
>> for item in it:
>> if item in res:
>> res[item] += 1
>> else:
>> res[item] = 1
>> return res
>
>
> I slightly prefer:
>
> def occurrences(it):
> res = {}
> res[item] = res.get(item, 0) + 1
> return res
Arg! In illustrating a trivial point, I dropped something essential.
This version has almost three minutes of testing behind it:
def occurrences(it):
res = {}
for item in it:
res[item] = res.get(item, 0) + 1
return res
--
--Bryan
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