human
Solve the following python programming problem given the following code:
def __call__(self, amf_request, **kwargs) : 
    '
        Calls the underlying service method.

        @return: A C{deferred} that will contain the AMF L{Response}.
        @rtype: C{Deferred<twisted.internet.defer.Deferred>}
        ' 
    deferred_response = defer.Deferred () 
    ro_request = amf_request.body [0] 
    def cb(amf_response) : 
        deferred_response.callback (amf_response) 
def eb(failure) : 
        errMesg = ('%s: %s' % (failure.type, failure.getErrorMessage ())) 
        if self.gateway.logger : 
            self.gateway.logger.error (errMesg) 
            self.gateway.logger.error (failure.getTraceback ()) 
deferred_response.callback (self.buildErrorResponse (ro_request, (failure.type, failure.value, failure.tb))) 
d = defer.maybeDeferred (self._getBody, amf_request, ro_request, ** kwargs) 
    d.addCallback (cb).addErrback (kwargs) 
    return deferred_response 

    
    

    Fix the buggy line: d.addCallback (cb).addErrback (kwargs)
assistant
#Here is Python program to fix the buggy line: d.

d.addCallback (cb).addErrback (def eb()