human
Solve the following python programming problem given the following code:
def test_produce_consume_noack(self) : 
    channel = self.c.channel () 
    producer = Producer (channel, self.e) 
    consumer = Consumer (channel, self.q, no_ack = True) 
    for i in range (10) : 
        producer.publish ({ 
            'foo' : i, 
}, routing_key = 'test_transport_memory') 
_received = [] 
    def callback(message_data, message) : 
        _received.append (message) 
consumer.register_callback (callback) 
    consumer.consume () 
    while 1 : 
        if (len (_received) == 10) : 
            break 
self.c.drain_events () 
self.assertEqual (len (channel), 10) 

    
    

    Fix the buggy line: self.assertEqual (len (channel), 10)
assistant
#Here is Python code to fix the buggy line: self.

self.assertEqual (len (_received), 10)