code: def test_invalid_getitem_key_err() -> None:
      df = pl.DataFrame({"x": [1.0], "y": [1.0]})
  
      with pytest.raises(KeyError, match=r"('x', 'y')"):
          df["x", "y"]
  
imports: from __future__ import annotations
  import io
  from datetime import date, datetime, time
  from decimal import Decimal
  from typing import TYPE_CHECKING, Any
  import numpy
  import pytest
  import polars
  from polars.datatypes.convert import dtype_to_py_type
  from polars.exceptions import InvalidOperationError
label_desc: Use image node_id 43 for calling a global function with example usage: test_invalid_getitem_key_err() without return types