[Python-Dev] Currently baking idea for dict.sequpdate(iterable, value=True)

[Guido van Rossum]

> >   x = {}.sequpdate(...)
> > 
> > which suggests that you're really looking for a different constructor
> > as a class method.
> 
> Yes!
> 
> Will revise the patch accordingly
> and use Just's suggested name, fromseq().
> 
> Do you prefer the default value to be None or True?
> Earlier discussions on python-dev showed that
> True is more meaningful to some in the context of
> membership testing.  OTOH, dict.setvalue and 
> dict.get both use None.

I think it should be None -- let's be explicit when we want True.

--Guido van Rossum (home page: http://www.python.org/~guido/)