code: def allocate_bytes(pool, nbytes):
      """
      Temporarily allocate *nbytes* from the given *pool*.
      """
      arr = pa.array(
          [b"x" * nbytes], type=pa.binary(), memory_pool=pool
      )
      # Fetch the values buffer from the varbinary array and release the rest,
      # to get the desired allocation amount
      buf = arr.buffers()[2]
      arr = None
      assert len(buf) == nbytes
      try:
          yield
      finally:
          buf = None
  
imports: import contextlib
  import os
  import signal
  import subprocess
  import sys
  import weakref
  import pyarrow
  import pytest
label_desc: Use image node_id 2 for calling a global function with example usage: allocate_bytes(pool, nbytes) without return types