code: def _preprocess_grid(grid: Grid | int | None) -> Grid:
      if grid is None:
          return ()
      if isinstance(grid, int):
          return (grid,)
      return grid
  
imports: from __future__ import annotations
  from collections.abc import Sequence
  import contextlib
  import dataclasses
  import functools
  from typing import Any, Callable
  from collections.abc import Iterator
  from jax._src import api_util
  from jax._src import core
  from jax._src import linear_util
  from jax._src import state
  from jax._src import tree_util
  from jax._src import util
  from jax._src.interpreters import partial_eval
  from jax._src.state import discharge
  import jax.numpy
label_desc: Use image node_id 3 for calling a global function with example usage: _preprocess_grid(grid) and returns: grid, , grid