dictionary initialization

[Gerrit]

Peter Hansen wrote:
> >In my example, it was b[1]+=1. "+=1" should at least tell Python two
> >things: this is an add operation and one of the operands is an
> >integer. 
> 
> Why would it tell Python that?

Well, the rhs of 'foo+=1' is always an integer.

Gerrit.

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