code: def test_parquet_list_arg(io_files_path: Path) -> None:
      first = io_files_path / "foods1.parquet"
      second = io_files_path / "foods2.parquet"
  
      df = pl.scan_parquet(source=[first, second]).collect()
      assert df.shape == (54, 4)
      assert df.row(-1) == ("seafood", 194, 12.0, 1)
      assert df.row(0) == ("vegetables", 45, 0.5, 2)
  
imports: from __future__ import annotations
  from collections import OrderedDict
  from pathlib import Path
  from typing import TYPE_CHECKING, Any
  import pandas
  import pytest
  import polars
  from polars.testing import assert_frame_equal
label_desc: Use image node_id 18 for calling a global function with example usage: test_parquet_list_arg(io_files_path) without return types