Check for dict key existence, and modify it in one step.

[Bruno Desthuilliers]

rodrigo a écrit :
> You're right of course, I was unclear. I wasn't using 'dict' to
> override the dict clas, but just as a standin for the example (the
> actual dictionary names are varied).

I guessed so, but Python's behaviour wrt/ naming can be somewhat 
surprising for newcomers, and accidentally shadowing builtins (or not 
builtins FWIW) names is a common pitfall. So better to warn newcomers 
lurking here !-)