human
Solve the following python programming problem given the following code:
def _spawn_dibbler(self, pmon, router_ns, dibbler_conf) : 
    def callback(pid_file) : 
        dibbler_cmd = ['dibbler-client', 'start', '-w', ('%s' % dibbler_conf)] 
        return dibbler_cmd 
pm = external_process.ProcessManager (uuid = self.requestor_id, default_cmd_callback = callback, namespace = pm, service = PD_SERVICE_NAME, conf = cfg.CONF, pid_file = self.pid_path) 
    pm.enable (reload_cfg = False) 
    pmon.register (uuid = self.requestor_id, service_name = PD_SERVICE_NAME, monitored_process = pm) 

    
    

    Fix the buggy line: pm = external_process.ProcessManager (uuid = self.requestor_id, default_cmd_callback = callback, namespace = pm, service = PD_SERVICE_NAME, conf = cfg.CONF, pid_file = self.pid_path)
assistant
#Here is Python program to fix the buggy line: pm = external_process.

pm = external_process.ProcessManager (uuid = self.requestor_id, default_cmd_callback = callback, namespace = router_ns, service = PD_SERVICE_NAME, conf = cfg.CONF, pid_file = self.pid_path)