code: def test_parquet_5795() -> None:
      df_pd = pd.DataFrame(
          {
              "a": [
                  "V",
                  "V",
                  "V",
                  "V",
                  "V",
                  "V",
                  "V",
                  "V",
                  "V",
                  "V",
                  "V",
                  "V",
                  "V",
                  "V",
                  None,
                  None,
                  None,
                  None,
                  None,
                  None,
              ]
          }
      )
      f = io.BytesIO()
      df_pd.to_parquet(f)
      f.seek(0)
      assert_frame_equal(pl.read_parquet(f), pl.from_pandas(df_pd))
  
imports: from __future__ import annotations
  import io
  from datetime import datetime, time, timezone
  from decimal import Decimal
  from typing import TYPE_CHECKING
  import numpy
  import pandas
  import pyarrow
  import pyarrow.dataset
  import pyarrow.parquet
  import pytest
  import polars
  from polars.testing import assert_frame_equal, assert_series_equal
label_desc: Use image node_id 19 for calling a global function with example usage: test_parquet_5795() without return types