code: def test_index_drop_duplicates(self):
      pidx = pd.Index([1, 1, 2])
      psidx = ps.from_pandas(pidx)
      self.assert_eq(
          pidx.drop_duplicates().sort_values(),
          psidx.drop_duplicates().sort_values(),
      )
  
      pidx = pd.MultiIndex.from_tuples(
          [(1, 1), (1, 1), (2, 2)], names=["level1", "level2"]
      )
      psidx = ps.from_pandas(pidx)
      self.assert_eq(
          pidx.drop_duplicates().sort_values(),
          psidx.drop_duplicates().sort_values(),
      )
  
file_path: spark/python/pyspark/pandas/tests/indexes/test_drop.py
imports: import unittest
  import numpy
  import pandas
  import pyspark.pandas
  from pyspark.testing.pandasutils import ComparisonTestBase, TestUtils
label_desc: Use image node_id 7 for calling the IndexesDropMixin obj's underlying member method code with example usage: obj.test_index_drop_duplicates() without return types