"Andre Engels" <andreeng...@gmail.com> wrote
What is this: d = [ int(x) for x in s.split(":") ]
That's called list comprehension. The notation
[f(x) for x in A if p(x)]
means:
Form a list in the following way:
For Wayne's benefit...
You will also find a similar construction in parens called
a generator expression (like tuoles the parens aren't always
necessary but usually help). That produces an iterable that
you can loop over without actually creating a list per se.
ie you can write:
foo = [1,2,3,4]
for n in (x for x in foo if x % 2):
... print n
...
1
3
In Python v3 list comprehensions and generator expressions
have been "merged" in that putting a GE inside [] has the
same effect as a LC. In practice this makes little or no difference
to the programmer its just how Python handles it behind the
scenes.
HTH,
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/l2p/
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