code: def simple_multiindex_dataframe():
      """
      Factory function to create simple 3 x 3 dataframe with
      both columns and row MultiIndex using supplied data or
      random data by default.
      """
  
      data = np.random.default_rng(2).standard_normal((3, 3))
      return DataFrame(
          data,
          columns=[[2, 2, 4], [6, 8, 10]],
          index=[[4, 4, 8], [8, 10, 12]],
      )
  
file_path: pandas/pandas/tests/indexing/multiindex/test_iloc.py
imports: import numpy
  import pytest
  from pandas import DataFrame, MultiIndex, Series
  import pandas._testing
label_desc: Use image node_id 1 for calling a global function with example usage: simple_multiindex_dataframe() and returns: DataFrame