code: def test_setitem(setup, gen_data1):
      """
      The output of DataFrameSetitem should preserve the column being set so that tile can work
      correctly.
      """
      file_path, file_path2 = gen_data1
      df = md.read_csv(file_path)
      df2 = md.read_csv(file_path2)
  
      df["c5"] = df2["c1"]
      r = df.groupby(by="c1", as_index=False).sum()["c2"]
  
      graph = r.build_graph()
      optimize(graph)
  
      index_node = graph.result_tileables[0]
      assert isinstance(index_node.op, DataFrameIndex)
      assert index_node.name == "c2"
  
      assert len(graph.predecessors(index_node)) == 1
      gb_node = graph.predecessors(index_node)[0]
      assert isinstance(gb_node.op, DataFrameGroupByAgg)
      assert set(gb_node.dtypes.index) == {"c1", "c2"}
  
      assert len(graph.predecessors(gb_node)) == 1
      index_node_2 = graph.predecessors(gb_node)[0]
      isinstance(index_node_2.op, DataFrameIndex)
      assert set(index_node_2.dtypes.index) == {"c1", "c2"}
  
      assert len(graph.predecessors(index_node_2)) == 1
      setitem_node = graph.predecessors(index_node_2)[0]
      isinstance(setitem_node.op, DataFrameSetitem)
      assert set(setitem_node.dtypes.index) == {"c1", "c2", "c5"}
  
      assert len(graph.predecessors(setitem_node)) == 2
      read_csv_node, index_node_3 = graph.predecessors(setitem_node)
      assert isinstance(read_csv_node.op, DataFrameReadCSV)
      assert isinstance(index_node_3.op, DataFrameIndex)
      assert set(read_csv_node.op.usecols) == {"c1", "c2"}
      assert index_node_3.name == "c1"
  
      assert len(graph.predecessors(index_node_3)) == 1
      read_csv_node_2 = graph.predecessors(index_node_3)[0]
      assert isinstance(read_csv_node_2.op, DataFrameReadCSV)
      assert read_csv_node_2.op.usecols == ["c1"]
  
      raw1 = pd.read_csv(file_path)
      raw2 = pd.read_csv(file_path2)
      raw1["c5"] = raw2["c1"]
      expected = raw1.groupby(by="c1", as_index=False).sum()["c2"]
      pd.testing.assert_series_equal(r.execute().fetch(), expected)
  
imports: import os
  import tempfile
  import pandas
  import pytest
  from ......None import dataframe
  from ......None import tensor
  from ......dataframe.arithmetic import DataFrameMul
  from ......dataframe.base.eval import DataFrameEval
  from ......dataframe.base.isin import DataFrameIsin
  from ......dataframe.core import DataFrameData, SeriesData, DataFrameGroupByData
  from ......dataframe.datasource.dataframe import DataFrameDataSource
  from ......dataframe.datasource.read_csv import DataFrameReadCSV
  from ......dataframe.datasource.read_parquet import DataFrameReadParquet
  from ......dataframe.groupby.aggregation import DataFrameGroupByAgg
  from ......dataframe.groupby.core import DataFrameGroupByOperand
  from ......dataframe.indexing.getitem import DataFrameIndex
  from ......dataframe.indexing.setitem import DataFrameSetitem
  from ......dataframe.merge import DataFrameMerge
  from ......optimization.logical.tileable import optimize
  from ......tensor.core import TensorData
  from ......tensor.datasource import ArrayDataSource
label_desc: Use image node_id 15 for calling a global function with example usage: test_setitem(setup, gen_data1) without return types