python 一个捕获异常的例子

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    try:
        memory_usage_percent_data = (1 - int(free_memory) / int(total_memory)) * 100
        memory_usage_percent='{:.3f}'.format(memory_usage_percent_data)
        return str(memory_usage_percent)+'%'
    except ZeroDivisionError:
        print("Error: Division by zero is not allowed.不允许除以零。")
        return None  # 或者可以设置为某个特定的错误代码或消息
    else:
        pass
    finally:
        pass

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