code: def test_assign_multiple(self):
      df = DataFrame([[1, 4], [2, 5], [3, 6]], columns=["A", "B"])
      result = df.assign(C=[7, 8, 9], D=df.A, E=lambda x: x.B)
      expected = DataFrame(
          [[1, 4, 7, 1, 4], [2, 5, 8, 2, 5], [3, 6, 9, 3, 6]],
          columns=list("ABCDE"),
      )
      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 2 for calling the TestAssign obj's underlying member method code with example usage: obj.test_assign_multiple() without return types