code: def __init__(self, path: str):
      self.__path: str = os.path.expanduser(os.path.normpath(path))
      self.__fetch()
      self.__preprocess()
  
file_path: AutoGL/autogl/datasets/_data_source.py
imports: import os
  import typing
label_desc: Use image node_id 15 to create a new OnlineDataSource object  with example: obj = OnlineDataSource(path)