code: def _get_cache_or_reload(
      github,
      force_reload,
      trust_repo,
      calling_fn,
      verbose=True,
      skip_validation=False,
  ):
      # Setup hub_dir to save downloaded files
      hub_dir = get_dir()
      os.makedirs(hub_dir, exist_ok=True)
      # Parse github repo information
      repo_owner, repo_name, ref = _parse_repo_info(github)
      # Github allows branch name with slash '/',
      # this causes confusion with path on both Linux and Windows.
      # Backslash is not allowed in Github branch name so no need to
      # to worry about it.
      normalized_br = ref.replace("/", "_")
      # Github renames folder repo-v1.x.x to repo-1.x.x
      # We don't know the repo name before downloading the zip file
      # and inspect name from it.
      # To check if cached repo exists, we need to normalize folder names.
      owner_name_branch = "_".join(
          [repo_owner, repo_name, normalized_br]
      )
      repo_dir = os.path.join(hub_dir, owner_name_branch)
      # Check that the repo is in the trusted list
      _check_repo_is_trusted(
          repo_owner,
          repo_name,
          owner_name_branch,
          trust_repo=trust_repo,
          calling_fn=calling_fn,
      )
  
      use_cache = (not force_reload) and os.path.exists(repo_dir)
  
      if use_cache:
          if verbose:
              sys.stderr.write(f"Using cache found in {repo_dir}\n")
      else:
          # Validate the tag/branch is from the original repo instead of a forked repo
          if not skip_validation:
              _validate_not_a_forked_repo(repo_owner, repo_name, ref)
  
          cached_file = os.path.join(hub_dir, normalized_br + ".zip")
          _remove_if_exists(cached_file)
  
          try:
              url = _git_archive_link(repo_owner, repo_name, ref)
              sys.stderr.write(
                  f'Downloading: "{url}" to {cached_file}\n'
              )
              download_url_to_file(url, cached_file, progress=False)
          except HTTPError as err:
              if err.code == 300:
                  # Getting a 300 Multiple Choices error likely means that the ref is both a tag and a branch
                  # in the repo. This can be disambiguated by explicitely using refs/heads/ or refs/tags
                  # See https://git-scm.com/book/en/v2/Git-Internals-Git-References
                  # Here, we do the same as git: we throw a warning, and assume the user wanted the branch
                  warnings.warn(
                      f"The ref {ref} is ambiguous. Perhaps it is both a tag and a branch in the repo? "
                      "Torchhub will now assume that it's a branch. "
                      "You can disambiguate tags and branches by explicitly passing refs/heads/branch_name or "
                      "refs/tags/tag_name as the ref. That might require using skip_validation=True."
                  )
                  disambiguated_branch_ref = f"refs/heads/{ref}"
                  url = _git_archive_link(
                      repo_owner,
                      repo_name,
                      ref=disambiguated_branch_ref,
                  )
                  download_url_to_file(url, cached_file, progress=False)
              else:
                  raise
  
          with zipfile.ZipFile(cached_file) as cached_zipfile:
              extraced_repo_name = cached_zipfile.infolist()[0].filename
              extracted_repo = os.path.join(hub_dir, extraced_repo_name)
              _remove_if_exists(extracted_repo)
              # Unzip the code and rename the base folder
              cached_zipfile.extractall(hub_dir)
  
          _remove_if_exists(cached_file)
          _remove_if_exists(repo_dir)
          shutil.move(extracted_repo, repo_dir)  # rename the repo
  
      return repo_dir
  
imports: import contextlib
  import errno
  import hashlib
  import json
  import os
  import re
  import shutil
  import sys
  import tempfile
  import torch
  import uuid
  import warnings
  import zipfile
  from pathlib import Path
  from typing import Dict, Optional, Any
  from urllib.error import HTTPError, URLError
  from urllib.request import urlopen, Request
  from urllib.parse import urlparse
  from torch.serialization import MAP_LOCATION
label_desc: Use image node_id 10 for calling a global function with example usage: _get_cache_or_reload(github, force_reload, trust_repo, calling_fn, verbose, skip_validation) and returns: repo_dir