code: def test_assign_dependent(self):
      df = DataFrame({"A": [1, 2], "B": [3, 4]})
  
      result = df.assign(C=df.A, D=lambda x: x["A"] + x["C"])
      expected = DataFrame(
          [[1, 3, 1, 2], [2, 4, 2, 4]], columns=list("ABCD")
      )
      tm.assert_frame_equal(result, expected)
  
      result = df.assign(
          C=lambda df: df.A, D=lambda df: df["A"] + df["C"]
      )
      expected = DataFrame(
          [[1, 3, 1, 2], [2, 4, 2, 4]], columns=list("ABCD")
      )
      tm.assert_frame_equal(result, expected)
  
file_path: pandas/pandas/tests/frame/methods/test_assign.py
imports: import pytest
  from pandas import DataFrame
  import pandas._testing
label_desc: Use image node_id 5 for calling the TestAssign obj's underlying member method code with example usage: obj.test_assign_dependent() without return types