[Jeremy Hylton]
> We agreed yesterday that the dictionary() constructor would accept a
> a list of two-tuples (strictly speaking an iterable object of iterable
> objects of length 2).
FYI, this is checked in now.
> That plus list comprehensions pretty much covers the territory of
> dict comprehensions:
>
> >>> print dictionary([(i, chr(65 + i)) for i in range(4)])
> {0: 'A', 1: 'B', 2: 'C', 3: 'D'}
Wow -- that's *exactly* what it prints. You got your own time machine now?
While it covers the semantics, the pragmatics may be off, since listcomps
produce genuine lists, and so e.g.
dictionary([(key, f(key)) for key in file('huge')])
may require constructing an unboundedly large list of twoples before
dictionary() sees the first pair. dictionary() per se doesn't require
materializing a giant list in one gulp.
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