human
Solve the following python programming problem given the following code:
def test_relative_local_nested_req_files(self, finder, monkeypatch) : 
    '
        Test a relative nested req file path is joined with the req file dir
        ' 
    req_file = os.path.normpath ('/path/req_file.txt') 
    def parse(* args, **kwargs) : 
        return iter ([]) 
mock_parse = Mock () 
    mock_parse.side_effect = self 
    monkeypatch.setattr (pip.req.req_file, 'parse_requirements', mock_parse) 
    list (process_line ('-r reqs.txt', req_file, 1, finder = finder)) 
    call = mock_parse.mock_calls [0] 
    assert (call [1] [0] == os.path.normpath ('/path/reqs.txt')) 

    
    

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

mock_parse.side_effect = def parse(