On Sun, May 3, 2009 at 7:36 PM, Ross <ross.j...@gmail.com> wrote: > For the past couple weeks, I've been working on an algorithm to > schedule tennis leagues given court constraints and league > considerations (i.e. whether it's a singles or a doubles league). Here > were my requirements when I was designing this algorithm: > > -Each player plays against a unique opponent each week. > -Similarly, in a doubles league, each player plays with a unique > partner each week. > -Each player gets a fair number of bye weeks (i.e. the player with the > most bye weeks will have no more than one bye week than the player > with the least number of bye weeks) > > I'm very close to arriving at my desired solution, but I have one > glaring flaw. When I have an even number of players sign up for my > league and there are court constraints, my current algorithm gives the > first player in my league a bye week every single week. I'll post my > code below and see how you guys think I should add to/ amend my code. > > def round_robin(players, rounds): > if len(players)%2: > players.insert(0, None) > mid = len(players)//2 > for i in range(rounds): > yield zip(players[:mid], players[mid:]) > players = players[0:1] + players[mid:mid+1] + players[1:mid-1] + > players[mid+1:] + players[mid-1:mid] > > > def test_round_robin(players, rounds, courts, doubles = False): > players = range(players) > for week in round_robin(players,rounds,courts): > if doubles == True: > doubles_week = len(week)/2.0 > byes = doubles_week - courts > if byes == 0: > bye_list = [] > else: > bye_list = > week[::int(round(1.072*(courts/byes)+1.08))] > playing = [u for u in week if u not in bye_list] > midd = len(playing)//2 > doub_sched = zip(playing[:midd], playing[midd:]) > print doub_sched, bye_list > else: > byes = len(week)- courts > if byes == 0: > bye_list = [] > else: > bye_list = > week[::int(round(1.072*(courts/byes)+1.08))] > playing = [u for u in week if u not in bye_list] > print playing, bye_list
Probably not the cause of the problem, but where did the magic numbers 1.072 and 1.08 come from? Cheers, Chris -- http://blog.rebertia.com -- http://mail.python.org/mailman/listinfo/python-list
