code: def test_update_where_query(df):
      """Test that function works with pandas query-style string expression."""
  
      expected = pd.DataFrame(
          {"a": [1, 2, 3, 4], "b": [5, 6, 7, 8], "c": [0, 0, 10, 0]}
      )
      result = update_where(
          df,
          conditions="a > 2 and b < 8",
          target_column_name="c",
          target_val=10,
      )
  
      assert_frame_equal(result, expected)
  
file_path: pyjanitor/tests/functions/test_update_where.py
imports: import pandas
  import pytest
  from pandas.testing import assert_frame_equal
  from janitor.functions import update_where
label_desc: Use image node_id 3 for calling a global function with example usage: test_update_where_query(df) without return types