function that counts...

[Jean-Michel Pichavant]

superpollo wrote:
> 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.
My apologies then, for both statements.
I still don't see "how many positive integers less than n have digits 
that sum up to m" makes it a "partition" though if that what prttn 
means. Surely because I miss the context.

JM