code: def test_converters(self):
      # use of custom converters
      basepath = self.tempdir.name
      maps = sorted(
          self.sc.sequenceFile(
              basepath + "/sftestdata/sfmap/",
              "org.apache.hadoop.io.IntWritable",
              "org.apache.hadoop.io.MapWritable",
              keyConverter="org.apache.spark.api.python.TestInputKeyConverter",
              valueConverter="org.apache.spark.api.python.TestInputValueConverter",
          ).collect()
      )
      em = [
          ("\x01", []),
          ("\x01", [3.0]),
          ("\x02", [1.0]),
          ("\x02", [1.0]),
          ("\x03", [2.0]),
      ]
      self.assertEqual(maps, em)
  
imports: import os
  import shutil
  import tempfile
  import unittest
  from pyspark.testing.utils import ReusedPySparkTestCase, SPARK_HOME
label_desc: Use image node_id 7 for calling the InputFormatTests obj's underlying member method code with example usage: obj.test_converters() without return types