[Tutor] Python Cookbook

[Yigal Duppen]

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> But what -is- the problem that some people have with lambda?  (You
> mention that you don't have a problem with it, but that implies that
> others do.)

Most people favoring lambda have experience in Functional Programming, Lisp 
and/or lambda calculus; people disliking it don't. To them, it probably looks 
obscure. 

> One last question -- in your final example above, you have an "if"
> statement FOLLOWING the "main" part of the list comprehension.  Is this
> a normal Python construction or something that is allowed for list
> comprehensions only?  I have seen that sort of construction in Perl:

No, the trailing if is only allowed in LCs. Luckily. Furthermore, in LCs the 
if _must_ be trailing; for example, the following is illegal:

[ x if x % 2 == 0 for x in [1,2,3]]

otoh, the following is legal:

[ x for x in [1, 2, 3, 4] if x % 2 == 0 and x < 4 ]

>    print "Correct" if ($correct);

Indeed one of the more horrible examples from Perl ;)

YDD
- -- 
http://www.xs4all.nl/~yduppen
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