human
Solve the following python programming problem given the following code:
@ given (turns = integers (min_value = 1, max_value = 200)) 
@ example (turns = 3) 
@ example (turns = 200) 
def test_play_matches(self, turns) : 
    tournament = axelrod.Tournament (name = self.test_name, players = self.players, game = self.game, repetitions = self.test_repetitions) 
    def make_generator() : 
        'Return a generator used by this method' 
        player_classes = [axelrod.Cooperator, axelrod.TitForTat, axelrod.Defector, axelrod.Grudger] 
        for (i, player_cls) in enumerate (player_classes) : 
            for (j, opponent_cls) in enumerate (player_classes) : 
                if (j >= i) : 
                    players = (player_cls (), opponent_cls ()) 
                    match = axelrod.Match (players, turns = turns) 
                    (yield ((i, j), match)) 
matches_generator = make_generator () 
    interactions = tournament._play_matches (matches_generator) 
    self.assertEqual (len (interactions), 10) 
    for (index_pair, inter) in interactions.items () : 
        self.assertEqual (len (inter), turns) 
        self.assertEqual (len (index_pair), 2) 
        for plays in inter : 
            self.assertIsInstance (plays, tuple) 
            self.assertEqual (len (plays), 2) 
self.assertEqual (len (list (tournament)), 0) 

    
    

    Fix the buggy line: self.assertEqual (len (list (tournament)), 0)
assistant
#Here is Python program to fix the buggy line: self.

self.assertEqual (len (list (matches_generator)), 0)