code: def process_preloads(
      dask_server: Server | Client,
      preload: str | list[str],
      preload_argv: list[str] | list[list[str]],
      *,
      file_dir: str | None = None,
  ) -> PreloadManager:
      if isinstance(preload, str):
          preload = [preload]
      if preload_argv and isinstance(preload_argv[0], str):
          preload_argv = [cast("list[str]", preload_argv)] * len(
              preload
          )
      elif not preload_argv:
          preload_argv = [cast("list[str]", [])] * len(preload)
      if len(preload) != len(preload_argv):
          raise ValueError(
              "preload and preload_argv have mismatched lengths "
              f"{len(preload)} != {len(preload_argv)}"
          )
  
      return PreloadManager(
          [
              Preload(dask_server, p, argv, file_dir)
              for p, argv in zip(preload, preload_argv)
          ]
      )
  
imports: from __future__ import annotations
  import filecmp
  import inspect
  import logging
  import os
  import shutil
  import sys
  from collections.abc import Iterable, Sequence
  from importlib import import_module
  from types import ModuleType
  from typing import TYPE_CHECKING, cast
  import click
  from dask.utils import tmpfile
  from distributed.core import Server
  from distributed.utils import import_file
label_desc: Use image node_id 5 for calling a global function with example usage: process_preloads(dask_server, preload, preload_argv) and returns: PreloadManager