Search for mapping solution
Mike C. Fletcher
mcfletch at rogers.com
Sun Jul 6 17:21:00 EDT 2003
result = {}
for (name, whatever, costs) in lines:
costs = float(number.replace(',','.'))
dict[name] = dict.get( name, 0.0) + costs
(that's untested, but you should get the idea). Note, however, floating
point is generally a poor choice for accounting applications, so you may
want to look into the libraries for fixed-point calculations.
HTH,
Mike
Markus Joschko wrote:
>Hi,
>stated in a post befor, I'm a java programmer, fascinated about the elegant
>way python solves iterations. Maybe you can show me a solution how to map
>the following
>
>I have a List:
>
>Name - Number - Costs
>
>lines = [['fred','333','0,10'],['sam','444','1'],['fred','333','0,50']]
>
>Now I want to have it in a dictionary(name,costs) Should look like
>{'fred':'0,60' , 'sam':'1'}
>
>What's an elegant way to do it? I can use a lot of loops, but I assume, that
>there is a better way of doing so.
>
>Thanks,
> Markus
>
>
_______________________________________
Mike C. Fletcher
Designer, VR Plumber, Coder
http://members.rogers.com/mcfletch/
More information about the Python-list
mailing list