Python complaints

[Aahz Maruch]

In article <38562655.77A3B3DC at udel.edu>,
Charles Boncelet  <boncelet at udel.edu> wrote:
>>> Attribution lost:
>>>>
>>>> There's nothing you can do with "map" you couldn't do "more Pythonically"
>>>> with list comprehensions; e.g.
>>>>     sq = map(lambda a: a**2, x)
>>>> vs
>>>>     sq = [a**2 for a in x]
>
>This is the first I've seen of this notation and it is simple and
>(reasonably) understandable.  But the savings is minimal versus normal
>Python
>
>fx = []
>for a in x:
>    fx.append(a**2)
>
>Am I missing something?

The theory is that because the list comprehension is a single statement,
you save some loop overhead (just as map() does).  For a large, tight
loop, it can make a difference.
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