code: def test_agate(self):
      self.assertIs(agate.csv.reader, agate.csv_py3.reader)
      self.assertIs(agate.csv.writer, agate.csv_py3.writer)
      self.assertIs(agate.csv.DictReader, agate.csv_py3.DictReader)
      self.assertIs(agate.csv.DictWriter, agate.csv_py3.DictWriter)
  
imports: import unittest
  import agate
label_desc: Use image node_id 1 for calling the TestCSV obj's underlying member method code with example usage: obj.test_agate() without return types