def _is_debugger_running():
    for frame in sys._current_frames().values():
        current_frame = frame
        while True:
            if os.path.basename(current_frame.f_code.co_filename) == 'bdb.py':
                return True

            if not current_frame.f_back:
                break

            current_frame = current_frame.f_back

    return False