text: from nonebot import on_command
  from nonebot.typing import T_State
  from nonebot.adapters import Bot, Event
  from . import lang
  import random
  
  def get_howl():
      char = ('嗷','呜','汪')
      length = random.randint(5,20)
      count = 0
      msg = ''
      while length != count:
          subscript = random.randint(0,2)
          msg += char[subscript]
          count += 1
      return msg
  
  matcher_howl = on_command('howl', priority=5)
  
  @matcher_howl.handle()
  async def main_howl(bot: Bot, event: Event, state: T_State):
      args = str(event.get_message()).strip().split()
      
      if len(args) == 0:
          msg = get_howl()
      else:
          msg = lang.help_guide
      
      await matcher_howl.finish(msg)