code: def precmd(self, line):
          
          args = shlex.split(line or "")
          if args and 'cookie=' in args[-1]:
              cookie_index = line.index('cookie=')
              cookie = line[cookie_index + 7:]
              line = line[:cookie_index].strip()
              self.cookie = cookie
          if line.startswith('#'):
              return ''
          elif '=' in line:
              # allow  somevar=somevalue
  
              # first check if we really mean a command
              cmdname = line.partition(" ")[0]
              if hasattr(self, "do_%s" % cmdname):
                  return line
  
              if not line.startswith("set "):
                  return "set " + line
              else:
                  return line
          if len(args) and args[0] in self.shortcuts:
              return "%s %s" % (self.shortcuts[args[0]], " ".join(args[1:]))
          else:
              return line
docs: Allow commands to have a last parameter of 'cookie=somevalue'
  
          TODO somevalue will be prepended onto any output lines so
          that editors can distinguish output from certain kinds
          of events they have sent.
  
          :param line:
          :return: