code: def create_series(self, key=None, tags=[], attrs={}):
          
  
          body = protocol.make_series_key(key, tags, attrs)
          resp = self.session.post(endpoint.SERIES_ENDPOINT, body)
          return resp
docs: Create a new series with an optional string key.  A list of tags
          and a map of attributes can also be optionally supplied.
  
          :param string key: (optional) a string key for the series
          :param list tags: (optional) the tags to create the series with
          :param dict attrs: (optional) the attributes to the create the series
                             with
          :rtype: :class:`tempodb.response.Response` object