How to use the billiard.util.get_logger function in billiard

def get_multiprocessing_logger():
    """Return the multiprocessing logger."""
    try:
        from billiard import util
    except ImportError:  # pragma: no cover
        pass
    else:
        return util.get_logger()

preparation_data = load(from_parent)
    prepare(preparation_data)
    # Huge hack to make logging before Process.run work.
    try:
        os.environ["MP_MAIN_FILE"] = sys.modules["__main__"].__file__
    except KeyError:
        pass
    except AttributeError:
        pass
    loglevel = os.environ.get("_MP_FORK_LOGLEVEL_")
    logfile = os.environ.get("_MP_FORK_LOGFILE_") or None
    format = os.environ.get("_MP_FORK_LOGFORMAT_")
    if loglevel:
        from billiard import util
        import logging
        logger = util.get_logger()
        logger.setLevel(int(loglevel))
        if not logger.handlers:
            logger._rudimentary_setup = True
            logfile = logfile or sys.__stderr__
            if hasattr(logfile, "write"):
                handler = logging.StreamHandler(logfile)
            else:
                handler = logging.FileHandler(logfile)
            formatter = logging.Formatter(
                format or util.DEFAULT_LOGGING_FORMAT,
            )
            handler.setFormatter(formatter)
            logger.addHandler(handler)

    self = load(from_parent)
    process.current_process()._inheriting = False

preparation_data = load(from_parent)
    prepare(preparation_data)
    # Huge hack to make logging before Process.run work.
    try:
        os.environ["MP_MAIN_FILE"] = sys.modules["__main__"].__file__
    except KeyError:
        pass
    except AttributeError:
        pass
    loglevel = os.environ.get("_MP_FORK_LOGLEVEL_")
    logfile = os.environ.get("_MP_FORK_LOGFILE_") or None
    format = os.environ.get("_MP_FORK_LOGFORMAT_")
    if loglevel:
        from billiard import util
        import logging
        logger = util.get_logger()
        logger.setLevel(int(loglevel))
        if not logger.handlers:
            logger._rudimentary_setup = True
            logfile = logfile or sys.__stderr__
            if hasattr(logfile, "write"):
                handler = logging.StreamHandler(logfile)
            else:
                handler = logging.FileHandler(logfile)
            formatter = logging.Formatter(
                format or util.DEFAULT_LOGGING_FORMAT,
            )
            handler.setFormatter(formatter)
            logger.addHandler(handler)

    self = load(from_parent)
    process.current_process()._inheriting = False

def prepare(data):
    '''
    Try to get current process ready to unpickle process object
    '''
    if 'name' in data:
        process.current_process().name = data['name']

    if 'authkey' in data:
        process.current_process().authkey = data['authkey']

    if 'log_to_stderr' in data and data['log_to_stderr']:
        util.log_to_stderr()

    if 'log_level' in data:
        util.get_logger().setLevel(data['log_level'])

    if 'sys_path' in data:
        sys.path = data['sys_path']

    if 'sys_argv' in data:
        sys.argv = data['sys_argv']

    if 'dir' in data:
        os.chdir(data['dir'])

    if 'orig_dir' in data:
        process.ORIGINAL_DIR = data['orig_dir']

    if 'start_method' in data:
        set_start_method(data['start_method'])

'''
    Try to get current process ready to unpickle process object
    '''
    old_main_modules.append(sys.modules['__main__'])

    if 'name' in data:
        process.current_process().name = data['name']

    if 'authkey' in data:
        process.current_process()._authkey = data['authkey']

    if 'log_to_stderr' in data and data['log_to_stderr']:
        util.log_to_stderr()

    if 'log_level' in data:
        util.get_logger().setLevel(data['log_level'])

    if 'sys_path' in data:
        sys.path = data['sys_path']

    if 'sys_argv' in data:
        sys.argv = data['sys_argv']

    if 'dir' in data:
        os.chdir(data['dir'])

    if 'orig_dir' in data:
        process.ORIGINAL_DIR = data['orig_dir']

    if 'main_path' in data:
        main_path = data['main_path']
        main_name = os.path.splitext(os.path.basename(main_path))[0]

def error(msg, *args, **kwargs):
    util.get_logger().error(msg, *args, **kwargs)

'''
    Try to get current process ready to unpickle process object
    '''
    old_main_modules.append(sys.modules['__main__'])

    if 'name' in data:
        process.current_process().name = data['name']

    if 'authkey' in data:
        process.current_process()._authkey = data['authkey']

    if 'log_to_stderr' in data and data['log_to_stderr']:
        util.log_to_stderr()

    if 'log_level' in data:
        util.get_logger().setLevel(data['log_level'])

    if 'sys_path' in data:
        sys.path = data['sys_path']

    if 'sys_argv' in data:
        sys.argv = data['sys_argv']

    if 'dir' in data:
        os.chdir(data['dir'])

    if 'orig_dir' in data:
        process.ORIGINAL_DIR = data['orig_dir']

    if 'main_path' in data:
        main_path = data['main_path']
        main_name = os.path.splitext(os.path.basename(main_path))[0]