Swingers_Party

#!/usr/bin/python
#/home/clockworkpc/Documents/bin/swingList2.py

# Released under a GPLv3 Licence by Clockwork PC 2011
# www.clockworkpc.com.au

# You are entitled to the following four freedoms:
# Freedom 0: To run this program for any purpose
# Freedom 1: To study how this program works and change it to make it do what you wish
# Freedom 2: To redistribute copies so you can help your neighbour
# Freedom 3: To distribute copies of your modified version to others

import random

def permissiblePair(l,f):
 # Last names must be different
 return l[l.find(" ")+1:] != f[f.find(" ")+1:]

def main():

 leads = ['Mr Lindy', 'Mr Charleston', 'Mr Blues', 'Mr Balboa']
 follows = ['Mrs Lindy', 'Mrs Charleston', 'Mrs Blues', 'Mrs Balboa']

 # Note limitation of random.shuffle() at
 # http://docs.python.org/library/random.html#random.shuffle

 random.shuffle(follows)

 while len(leads)>0:
   if permissiblePair(leads[0],follows[0]):
     print leads[0]+ " gets to swing with " + follows[0]
     leads.pop(0)
     follows.pop(0)
   else:
     # Cycle follows
     f=follows.pop(0)
     follows.append(f)

if __name__=="__main__":
 main()