human
Solve the following python programming problem given the following code:
def test_starting_population_fitness_ordered(self) : 
    '
        Ensures that the starting population as returned by the GA is ordered
        according to the fitness function.
        ' 
    start_pop = [1, 2, 3] 
    def fitness(genome) : 
        '
            For illustrative purposes.
            ' 
        return (genome * genome) 
ga = genetic_algorithm (start_pop, self, None, None) 
    expected = [3, 2, 1] 
    actual = ga.next () 
    self.assertEqual (actual, expected, ('Actual: %r Expected: %r' % (actual, expected))) 

    
    

    Fix the buggy line: ga = genetic_algorithm (start_pop, self, None, None)
assistant
#Here is Python code to fix the buggy line: ga = genetic_algorithm (start_pop, self, None, None)
.

ga = genetic_algorithm (start_pop, def fitness(, None, None)