code: def test_pickle_small_integers() -> None:
      df = pl.DataFrame(
          [
              pl.Series([1, 2], dtype=pl.Int16),
              pl.Series([3, 2], dtype=pl.Int8),
              pl.Series([32, 2], dtype=pl.UInt8),
              pl.Series([3, 3], dtype=pl.UInt16),
          ]
      )
      b = pickle.dumps(df)
      assert_frame_equal(pickle.loads(b), df)
  
imports: from __future__ import annotations
  import io
  import pickle
  from datetime import datetime, timedelta
  import pytest
  import polars
  from polars import StringCache
  from polars.testing import assert_frame_equal, assert_series_equal
label_desc: Use image node_id 13 for calling a global function with example usage: test_pickle_small_integers() without return types