code: def search_keyword_top(self, category=None, count=20, period='today'):
          
          url = 'https://openapi.youku.com/v2/searches/keyword/top.json'
          params = {
              'client_id': self.client_id,
              'count': count,
              'period': period
          }
          if category:
              params['category'] = category
          r = requests.get(url, params=params)
          check_error(r)
          return r.json()
docs: doc: http://open.youku.com/docs/doc?id=84