[Tutor] Ingenious script (IMO)

Dick Moores rdm at rcblue.com
Mon Aug 6 17:43:50 CEST 2007

At 07:44 AM 8/6/2007, Kent Johnson wrote:
>Dick Moores wrote:
>>Gotta say though, I still don't understand how the defaultdict works here.
>Did you try the docs?

Yes, but it left me still in the dark.

>If coinCount were an ordinary dict, the line
>   coinCount[deno] += 1
>would have to be written as
>   coinCount[deno] = coinCount.get(deno, 0) + 1
>Using defaultdict(int) makes the use of 0 as the default value 
>automatic. (Actually the default value is obtained by calling int(), 
>whose value is 0.)

OK, thanks for spelling it out, Kent.


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