Bentournament | Python Fiddle

import itertools

def number_of_pool(players): # This function calculate the number of pools given a number of players (now it favor 3 players pools)
    i = players // 3
    return i
    
    
all_the_pools = {}

def make_pools_dict(categorie,number_of_players): # this function add the pool_dict to all_the_pools and make a place for each players  
    
    
    all_the_pools[categorie] = {} #add categorie as a dict entry in all_the_pools
        
    letters = 'abcdefghijklmnopqrstuvwxyz'
    
    pools = []
    
  
    for x in range(0,number_of_pool(number_of_players)): #create each pool of the categore as a list
        all_the_pools[categorie][categorie + "_" +letters[x].upper()] = []
    
        
    x = 0
    for i in range(1,number_of_players + 1):
            all_the_pools[categorie][categorie + "_" +letters[x].upper()].append("player"+str(i))
            x +=1
            if x == number_of_pool(number_of_players):
                x = 0

make_pools_dict("SMA",18)
make_pools_dict("DXA", 13)

def versus(all_the_pools): # This function take each pool individually and create an array with each match to be played
    for i in all_the_pools:
        for j in all_the_pools[i]:
            
            out_list = []
            for k in range(len(all_the_pools[i][j])):
    			out_list.extend(itertools.combinations(all_the_pools[i][j], 2))
			print out_list
            
            
            for k in all_the_pools[i][j]:
                index_list.append(k)
                
            
            
            match_list = itertools.combinations(index_list, 2)
            print match_list
         
versus(all_the_pools)

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