code: def test_deduplicate_timeseries_dataframe(self):
      with pytest.raises(RuntimeError):
          deduplicate_timeseries_dataframe(self.df, dt_col="z")
      with pytest.raises(RuntimeError):
          deduplicate_timeseries_dataframe(self.df, dt_col="a")
      res_df = deduplicate_timeseries_dataframe(
          self.df, dt_col="datetime"
      )
      assert len(res_df) == 50
  
file_path: BigDL/python/chronos/test/bigdl/chronos/data/utils/test_deduplicate.py
imports: import pytest
  import pandas
  import numpy
  from unittest import TestCase
  from bigdl.chronos.data.utils.deduplicate import deduplicate_timeseries_dataframe
  from ...None import op_torch, op_tf2
label_desc: Use image node_id 3 for calling the TestDeduplicateTimeSeries obj's underlying member method code with example usage: obj.test_deduplicate_timeseries_dataframe() without return types