human
Solve the following python programming problem given the following code:
def test_9() : 
    channel = ('test_9-' + str (time.time ())) 
    message = 'Hello World' 
    auth_key = ('auth-' + channel) 
    pubnub.set_auth_key (auth_key) 
    def _cb2(resp, ch = None) : 
        assert (resp == { 
            'message' : 'Success', 
            'payload' : { 
                'auths' : { 
                    auth_key : { 
                        'r' : 1, 
                        'm' : 0, 
                        'w' : 1, 
}, 
}, 
                'subscribe_key' : subkey, 
                'level' : 'user', 
                'channel' : channel, 
                'ttl' : 10, 
}, 
}) 
        def _cb3(resp, ch = None) : 
            assert (resp [0] == 1) 
            def _cb4(resp, ch = None) : 
                assert (resp == { 
                    'message' : 'Success', 
                    'payload' : { 
                        'auths' : { 
                            auth_key : { 
                                'r' : 0, 
                                'm' : 0, 
                                'w' : 0, 
}, 
}, 
                        'subscribe_key' : subkey, 
                        'level' : 'user', 
                        'channel' : channel, 
                        'ttl' : 1, 
}, 
}) 
                def _cb5(resp, ch = None) : 
                    print (resp) 
                    assert False 
def _err5(resp) : 
                    assert (resp ['message'] == 'Forbidden') 
                    assert (resp ['payload'] == { 
                        'channels' : [channel], 
}) 
time.sleep (5) 
                pubnub.publish (channel = channel, message = message, callback = _cb5, error = _err5) 
def _err4(resp) : 
                assert False 
pubnub_pam.revoke (channel = channel, auth_key = auth_key, callback = _cb4, error = _err4) 
def _err3(resp) : 
            assert False 
time.sleep (7) 
        pubnub.publish (channel = channel, message = message, callback = _cb3, error = _err3) 
def _err2(resp) : 
        assert False 
pubnub_pam.grant (channel = channel, read = True,...

    
    

    Fix the buggy line: pubnub_pam.grant (channel = channel, read = True, write = True, auth_key = auth_key, ttl = 10, callback = auth_key, error = _err2)
assistant
#Here is Python program to fix the buggy line: pubnub_pam.

pubnub_pam.grant (channel = channel, read = True, write = True, auth_key = auth_key, ttl = 10, callback = def _cb2(, error = _err2)