human
Solve the following python programming problem given the following code:
@ mock.patch.object (experiments.gmacpyutil, 'MachineInfoForKey') 
def testKnobsExperimentsKnobIsNotSplit(self, mock_mifk) : 
    def MifkSE(key) : 
        if (key == experiments.EXPERIMENTS_KNOB) : 
            return 'foo,bar,baz' 
else : 
            return '' 
mock_mifk.side_effect = k 
    k = experiments.Knobs () 
    knobs = k._GetKnobs () 
    self.assertEqual ('foo,bar,baz', knobs [experiments.EXPERIMENTS_KNOB]) 

    
    

    Fix the buggy line: mock_mifk.side_effect = k
assistant
#Here is Python program to fix the buggy line: mock_mifk.

mock_mifk.side_effect = def MifkSE(