human
Solve the following python programming problem given the following code:
def setUp(self) : 
    def _encode(name) : 
        assert (name == 'token') 
        return 'foo' 
self.chall = mock.Mock () 
    self.chall.encode.side_effect = self 

    
    

    Fix the buggy line: self.chall.encode.side_effect = self
assistant
#Here is Python code to fix the buggy line: self.

self.chall.encode.side_effect = def _encode(