class_docstr: Downloading from hub
code: def __init__(self):
      self._download_lock = threading.Lock()
  
file_path: towhee/towhee/hub/cache_manager.py
imports: import os
  from pathlib import Path
  import threading
  from .downloader import download_operator, download_pipeline, repo_tag_path
label_desc: Use image node_id 1 to create a new CacheManager object  with example: obj = CacheManager()