function that counts...

[superpollo]

Jean-Michel Pichavant ha scritto:
> Jerry Hill wrote:
>> On Wed, May 19, 2010 at 3:58 PM, superpollo <utente at esempio.net> wrote:
>>  
>>> ... how many positive integers less than n have digits that sum up to m:
>>>     
>> ...
>>  
>>> any suggestion for pythonizin' it?
>>>     
>>
>> This is how I would do it:
>>
>> def prttn(m, n):
>>     """How many positive integers less than n have digits that sum up 
>> to m"""
>>     total = 0
>>     for testval in range(n):
>>         sumofdigits = sum(int(char) for char in str(testval))
>>         if sumofdigits == m:
>>             total += 1
>>     return total
>>
>> I added a docstring to the function, saying what it does, and what the
>> arguments are supposed to represent.  I also moved the
>> convert-to-string-and-sum-the-digits logic into a single generator
>> expression that's passed to the builtin sum function.  Oh, and I tried
>> to use slightly more expressive variable names.
>>
>>   
> my favorite solutio nso far.
> 
> @ OP
> 
> What means prttn ? 

i already answered this downthreads...

> something ... I don't find the word, something like un-intuitive. Sounds 
> like homework.

it is not.