code: def __getattr__(self, key: str) -> str:
      warnings.warn(
          "The str interface for _CascadingStyleSheet objects is deprecated. "
          "Use css.filename instead.",
          RemovedInSphinx90Warning,
          stacklevel=2,
      )
      return getattr(os.fspath(self.filename), key)
  
imports: from __future__ import annotations
  import os
  import warnings
  import zlib
  from typing import TYPE_CHECKING, Any, NoReturn
  from sphinx.deprecation import RemovedInSphinx90Warning
  from sphinx.errors import ThemeError
label_desc: Use image node_id 7 for calling the _CascadingStyleSheet obj's underlying member method code with example usage: obj.__getattr__(key) and returns: getattr