@ Introducing Python: Modern Computing in Simple Packages by Bill Lubanovic
(No. 2285 / 12833)

Comprehension make it possible for you to combine loops and conditional tests with a less verbose syntax.

@ Introducing Python: Modern Computing in Simple Packages by Bill Lubanovic
(No. 2319 / 12833)

The simplest form of list comprehension is:

[ expression for item in iterable ]

例を参考に実装してみた。
http://ideone.com/9l9LpH

number_list = [ 2 * number - 1 for number in range(1,5)]
print(number_list)

結果

[1, 3, 5, 7]

@ Introducing Python: Modern Computing in Simple Packages by Bill Lubanovic
(No. 2319 / 12833)

[ expression for item in iterable if condition ]

number_list = [ number for number in range(1,9) if number % 2 == 1]
print(number_list)

結果

[1, 3, 5, 7]

内包表記のことのようですね。

for文のあとにfor文を続けることもできる。