Comments on: Slick Code Tips: Python Lists can Build Lists

By: Ivan

Ivan — Wed, 29 Nov 2006 19:47:39 +0000

I believe this construct you outline is called a list comprehension in Python.

Ken-ichi — Wed, 29 Nov 2006 08:39:06 +0000

>>> coders = [kueda, n8, k7, mangosquasher] >>> max(coders) mangosquasher

mangosquasher — Wed, 29 Nov 2006 04:00:17 +0000

correction — under reduce, it should be:
>>> x = reduce(lambda x,y: x + y, range(5))

oops!

mangosquasher — Wed, 29 Nov 2006 03:57:16 +0000

Some of my favorite python functions:

map
>>> z = map(len, ["abc", "clouds", "rain"])
>>> z
[3, 6, 4]

lambda
>>> g = lambda u:u*u
>>> g(4)
16

filter
>>> x = [5,12,-2,13]
>>> y = filter(lambda z: z > 0, x)
>>> y
[5, 12, 13]

reduce
>>> x = reduce(lambda x,y: x y, range(5))
>>> x
10

walk
os.walk() performs recursion so you don’t have to!

Ken-ichi — Wed, 29 Nov 2006 00:29:09 +0000

Here’s my list of useful Python basics. We should get n8 to install a syntax highlighting plugin…