python 获取昨天、今天时间;求时间差

from datetime import date, timedelta

today = date.today().strftime("%Y-%m-%d %H:%M:%S")
yesterday = (date.today() + timedelta(days=-1)).strftime("%Y-%m-%d %H:%M:%S")

结果：
2021-12-20 00:00:00
2021-12-19 00:00:00

时间差：https://blog.csdn.net/lz_peter/article/details/79172899