安装datedays:

pip install datedays

代码：

import datedays

if __name__ == '__main__':
    print("现在时间：", datedays.getnow()) 		 # format_=格式,比如：%Y-%m-%d %H:%M:%S
    print('-' * 30)
    print("明天：", datedays.gettomorrow())
    print("后天：", datedays.gettomorrow(days=2))  # days等于多少，就是多少天
    print("30天后是几号：", datedays.gettomorrow(days=30))
    print("180天后是几月几号：", datedays.gettomorrow(days=180))
    print("1000天后是几月几号：", datedays.gettomorrow(days=1000))
    print('-' * 30)
    print("昨天：", datedays.getyesterday())
    print("前天：", datedays.getyesterday(days=2))
    print("180天前：", datedays.getyesterday(days=180))
    print("1000天前是几月几号：", datedays.getyesterday(days=1000))

结果：

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