code: def do_copy_config(self, line):
          
  
          def f(p, args):
              try:
                  source, target = args
              except:
                  print("argument error")
                  return
              print(p.copy_config(source, target))
  
          self._request(line, f)
docs: copy_config <peer> <source> <target>
          eg. copy_config sw1 running startup