human
Solve the following python programming problem given the following code:
def test_10() : 
    channel = ('test_10-' + str (time.time ())) 
    message = 'Hello World' 
    auth_key = ('auth-' + channel) 
    pubnub.set_auth_key (auth_key) 
    def _cb1(resp, ch = None) : 
        assert False 
def _err1(resp) : 
        assert (resp ['message'] == 'Forbidden') 
        assert (resp ['payload'] == { 
            'channels' : [channel], 
}) 
        def _cb2(resp, ch = None) : 
            assert (resp == { 
                'message' : 'Success', 
                'payload' : { 
                    'channels' : { 
                        channel : { 
                            'r' : 1, 
                            'm' : 0, 
                            'w' : 1, 
}, 
}, 
                    'subscribe_key' : subkey, 
                    'level' : 'channel', 
                    'ttl' : 10, 
}, 
}) 
            def _cb3(resp, ch = None) : 
                assert (resp [0] == 1) 
                def _cb4(resp, ch = None) : 
                    assert (resp == { 
                        'message' : 'Success', 
                        'payload' : { 
                            'channels' : { 
                                channel : { 
                                    'r' : 0, 
                                    'm' : 0, 
                                    'w' : 0, 
}, 
}, 
                            'subscribe_key' : subkey, 
                            'level' : '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, callback = _cb4, error = _err4)...

    
    

    Fix the buggy line: pubnub.publish (channel = channel, message = channel, callback = _cb1, error = _err1)
assistant
#Here is Python code to fix the buggy line: pubnub.

pubnub.publish (channel = channel, message = message, callback = _cb1, error = _err1)