Pairings generator

pairings.py

import itertools
import functools
import random



a = itertools.permutations(['David', 'Dicko', 'Matt', 'Paul', 'Ryan'], 5)

def swapper(x):
    y = list(x)
    if x[0] > x[1]:
        y[0], y[1] = x[1], x[0]

    if x[2] > x[3]:
        y[2], y[3] = x[3], x[2]

    return (y[0], y[1], y[2], y[3], y[4])

def swapper2(x):
    y = list(x)
    if x[0] > x[2]:
        y[0], y[1] = x[2], x[3]
        y[2], y[3] = x[0], x[1]

    return (y[0], y[1], y[2], y[3], y[4])

# def group_pairs(x):
#     return ((x[0], x[1]), (x[2], x[3]), (x[4],))

def ryan_not_alone(x):
    return x[4] != 'Ryan'

a = map(swapper, a)
a = map(swapper2, a)

a = list(set(a))

a = filter(ryan_not_alone, a)

# a = map(group_pairs, a)

random.shuffle(a)

for b in a:
    print '{0} and {1}, {2} and {3}, {4}'.format(*b)