def python_agent() -> str:
    """
    This static UA,'python-requests/2.27.1', is the Python default and
    works with all engines except DDG, where it is 403: Forbidden.

    :return: Default Python requests package header user agent.
    """

    # Obtained from : >>>requests.utils.default_headers()
    return 'python-requests/2.27.1'