code: def search(self, search_content, search_type, limit=9):
          
  
          url = 'http://music.163.com/weapi/cloudsearch/get/web?csrf_token='
          params = {'s': search_content, 'type': search_type, 'offset': 0,
                    'sub': 'false', 'limit': limit}
          result = self.post_request(url, params)
          return result
docs: Search entrance.
  
          :params search_content: search content.
          :params search_type: search type.
          :params limit: result count returned by weapi.
          :return: a dict.