code: def test_io_thread_count():
      n = pa.io_thread_count()
      assert n > 0
      try:
          pa.set_io_thread_count(n + 5)
          assert pa.io_thread_count() == n + 5
      finally:
          pa.set_io_thread_count(n)
  
file_path: arrow/python/pyarrow/tests/test_misc.py
imports: import os
  import subprocess
  import sys
  import pytest
  import pyarrow
  from pyarrow.lib import ArrowInvalid
label_desc: Use image node_id 4 for calling a global function with example usage: test_io_thread_count() without return types