code: def create_set(self, project, json_data=None, **options):
          
          url = URL.articlesets.format(**locals())
          if json_data is None:
              # form encoded request
              return self.request(url, method="post", data=options)
          else:
              if not isinstance(json_data, (string_types)):
                  json_data = json.dumps(json_data,default = serialize)
              headers = {'content-type': 'application/json'}
              return self.request(
                  url, method='post', data=json_data, headers=headers)
docs: Create a new article set. Provide the needed arguments using
          post_data or with key-value pairs