code: def fileno(self) -> int:
      raise AttributeError
  
file_path: mars/mars/lib/filesystem/_oss_lib/handle.py
imports: from io import IOBase
  from ....utils import lazy_import
  from .common import parse_osspath, oss_stat
label_desc: Use image node_id 3 for calling the OSSIOBase obj's underlying member method code with example usage: obj.fileno() without return types