I gotta have my orange juice.

Jesu, Juva

Python combinations

leave a comment »

In September 2007, Brian Adkins posted a simple Logo program to print all possible combinations of lists of items, and asked for alternatives in other languages. He provided a Ruby alternative which would translate fairly easily into Python. For my own Python implementation I decided to try a completely different approach:

prod1   = lambda elem, vec : map(lambda x : elem+' '+x, vec)
xprod   = lambda vec1, vec2 : reduce(list.__add__, map(lambda elem : prod1(elem ,vec2), vec1))
choices = lambda x : '\n'.join(reduce(xprod, x))+'\n'

q = [['small', 'medium', 'large'],
     ['vanilla', 'ultra chocolate', 'lychee', 'rum raisin', 'ginger'],
     ['cone', 'cup']]

print choices(q),

Written by Scott Moonen

September 1, 2007 at 7:25 pm

Posted in Python

Tagged with , ,

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: