code: def msg(self, msg, *args):
          
          if self.debuglevel > 0:
              self.stderr.write('Telnet(%s,%d): ' % (self.host, self.port))
              if args:
                  self.stderr.write(msg % args)
              else:
                  self.stderr.write(msg)
              self.stderr.write('\n')
docs: Print a debug message, when the debug level is > 0.
  
          If extra arguments are present, they are substituted in the
          message using the standard string formatting operator.