code: def test_fancy(self):
      idx = (self.df.index.to_series() % 2).astype(bool)
      assert type(self.df[idx]) is GeoDataFrame
  
imports: from pandas import DataFrame, Series
  from shapely.geometry import Point
  from geopandas import GeoDataFrame, GeoSeries
label_desc: Use image node_id 7 for calling the TestDataFrame obj's underlying member method code with example usage: obj.test_fancy() without return types