code: def test_frame_setitem_slice(multiindex_dataframe_random_data):
      df = multiindex_dataframe_random_data
      df.iloc[:4] = 0
  
      assert (df.values[:4] == 0).all()
      assert (df.values[4:] != 0).all()
  
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 8 for calling a global function with example usage: test_frame_setitem_slice(multiindex_dataframe_random_data) without return types