code: def get_last_ticker(self, symbol):
          
          params = {'symbol': symbol}
  
          url = u.MARKET_URL + '/market/trade'
  
          def _wrapper(_func):
              @wraps(_func)
              def handle():
                  _func(http_get_request(url, params))
  
              return handle
  
          return _wrapper
docs: 获取最新的ticker
          :param symbol
          :return: