human
Solve the following python programming problem given the following code:
def onConnectionMade(self, xs) : 
    '
        Called when a component connection was made.

        This enables traffic debugging on incoming streams.
        ' 
    xs.serial = self.serial 
    self.serial += 1 
    def logDataIn(buf) : 
        log.msg (('RECV (%d): %r' % (xs.serial, buf))) 
def logDataOut(buf) : 
        log.msg (('SEND (%d): %r' % (xs.serial, buf))) 
if self.logTraffic : 
        xs.rawDataInFn = logDataIn 
        xs.rawDataOutFn = logDataOut 
xs.addObserver (xmlstream.STREAM_ERROR_EVENT, logDataOut.onError) 

    
    

    Fix the buggy line: xs.addObserver (xmlstream.STREAM_ERROR_EVENT, logDataOut.onError)
assistant
#Here is Python program to fix the buggy line: xs.

xs.addObserver (xmlstream.STREAM_ERROR_EVENT, self.onError)