Python 内置时间模块：Datetime-时间对象的运算

import datetime
# 获取当天最小时间
print(datetime.datetime.combine(datetime.date.today(),datetime.time.min))
print(datetime.datetime(2021, 11, 16, 0, 0))
# 获取当天最大时间
print(datetime.datetime.combine(datetime.date.today(),datetime.time.max))
print(datetime.datetime(2021, 11, 16, 23, 59, 59, 999999))

运行结果：

# 获取明天
print(datetime.date.today() + datetime.timedelta(days=1))

# 获 取 前 一 天
print(datetime.date.today() - datetime.timedelta(days=1))

运行结果：

#获取本周第一天及最后一天
d_today = datetime.date.today()
print(d_today)
# 获取本周第一天
print(d_today - datetime.timedelta(d_today.weekday()))
# 获取本周最后一天
print(d_today + datetime.timedelta(6-d_today.weekday()))

运行结果：

# timedelta对象的计算
dt2 = d_today + datetime.timedelta(6-d_today.weekday())
td1 = dt2 - d_today
print(td1)
#相差多少秒
print(td1.total_seconds())

运行结果：