class_docstr: Tests for st.secrets with multiple secrets.toml files.
class_docstr_tok: ["Tests","for","st.secrets","with","multiple","secrets.toml","files","."]
code: def tearDown(self) -> None:
      os.environ.clear()
      os.environ.update(self._prev_environ)
  
      os.remove(self._path1)
      os.remove(self._path2)
  
imports: import os
  import tempfile
  import unittest
  from collections.abc import Mapping
  from collections.abc import MutableMapping
  from typing import Mapping, MutableMapping
  from unittest.mock import MagicMock, mock_open, patch
  from parameterized import parameterized
  from toml import TomlDecodeError
  from streamlit.runtime.secrets import SECRETS_FILE_LOCS, AttrDict, Secrets
  from tests.exception_capturing_thread import call_on_threads
label_desc: Use image node_id 2 for calling the MultipleSecretsFilesTest obj's underlying member method code with example usage: obj.tearDown() without return types