human
Solve the following python programming problem given the following code:
@ pytest.fixture (scope = 'session', autouse = True) 
def cleanup(request) : 
    def fin() : 
        reactor.callFromThread (reactor.stop) 
request.addfinalizer (request) 

    
    

    Fix the buggy line: request.addfinalizer (request)
assistant
#Here is Python program to fix the buggy line: request.

request.addfinalizer (def fin()