function that counts...

[superpollo]

Jerry Hill ha scritto:
> 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))

this line gives me this:

TypeError: 'int' object is not callable

is it some new feature in >2.5 ?

>         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.
>