[EMAIL PROTECTED]
> > > How well correlated in the use of map()-with-fill with the
> > > (need for) the use of zip/izip-with-fill?
[raymond]
> > Close to 100%. A non-iterator version of izip_longest() is exactly
> > equivalent to map(None, it1, it2, ...).
[EMAIL PROTECTED]
> If I use map()
> I can trivially determine the arguments lengths and deal with
> unequal length before map(). With iterators that is more
> difficult. So I can imagine many cases where izip might
> be applicable but map not, and a lack of map use cases
> not representative of izip use cases.
You don't seem to understand what map() does. There is no need to
deal with unequal argument lengths before map(); it does the work for
you. It handles iterator inputs the same way. Meditate on this:
def izip_longest(*args):
return iter(map(None, *args))
Modulo arbitrary fill values and lazily evaluated inputs, the semantics
are exactly what is being requested. Ergo, lack of use cases for
map(None,it1,it2) means that izip_longest(it1,it2) isn't needed.
Raymond
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