human
Solve the following python programming problem given the following code:
def c() : 
    channel_wc = 'c.*' 
    channel = 'c.d' 
    def callback(message1, channel1, real_channel = None) : 
        print (((((channel1 + ' : ') + real_channel) + ' : ') + str (message1))) 
        pubnub.unsubscribe (channel = 'c.*') 
        print (pubnub.publish (channel = channel, message = 'c1')) 
def error(message) : 
        print (('ERROR : ' + str (message))) 
def connect(channel1 = None) : 
        print (('Connect on ' + channel1)) 
        print (pubnub.publish (channel = channel, message = 'c')) 
def disconnect(channel1 = None) : 
        print (('Disconnect on ' + channel1)) 
def reconnect(channel1 = None) : 
        print (('Reconnect on ' + channel1)) 
pubnub.subscribe (channels = channel_wc, callback = channel_wc, error = callback, connect = connect, disconnect = disconnect, reconnect = reconnect) 

    
    

    Fix the buggy line: pubnub.subscribe (channels = channel_wc, callback = channel_wc, error = callback, connect = connect, disconnect = disconnect, reconnect = reconnect)
assistant
#Here is Python program to fix the buggy line: pubnub.

pubnub.subscribe (channels = channel_wc, callback = callback, error = callback, connect = connect, disconnect = disconnect, reconnect = reconnect)