How to use check_os_environ_stable method in tox

Best Python code snippet using tox_python

conftest.py

Source:conftest.py

...92@pytest.fixture(autouse=True)93def ignore_global_config(tmp_path, monkeypatch):94    monkeypatch.setenv(ensure_str("VIRTUALENV_CONFIG_FILE"), str(tmp_path / "this-should-never-exist"))95@pytest.fixture(autouse=True)96def check_os_environ_stable():97    old = os.environ.copy()98    # ensure we don't inherit parent env variables99    to_clean = {100        k101        for k in os.environ.keys()102        if k.startswith(str("VIRTUALENV_")) or str("VIRTUAL_ENV") in k or k.startswith(str("TOX_"))103    }104    cleaned = {k: os.environ[k] for k, v in os.environ.items()}105    os.environ[str("VIRTUALENV_NO_DOWNLOAD")] = str("1")106    is_exception = False107    try:108        yield109    except BaseException:110        is_exception = True...

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