code: def test_sort_by_exprs() -> None:
      # make sure that the expression does not overwrite columns in the dataframe
      df = pl.DataFrame({"a": [1, 2, -1, -2]})
      out = df.sort(pl.col("a").abs()).to_series()
  
      assert out.to_list() == [1, -1, 2, -2]
  
imports: from __future__ import annotations
  from datetime import date, datetime
  from typing import Any
  import pytest
  import polars
  from polars.testing import assert_frame_equal, assert_series_equal
label_desc: Use image node_id 3 for calling a global function with example usage: test_sort_by_exprs() without return types