import datetime

#获取当前日期年月日
print(datetime.date.today())                  # 2021-10-15

#获取当前日期前一天日期，利用当前日期减去一天日期
Today = datetime.date.today()
print(Today - datetime.timedelta(days=1))     # 2021-10-14

#获取当前日期后一天日期，利用当前日期加上一天日期
Today = datetime.date.today()
print(Today + datetime.timedelta(days=1))     # 2021-10-16

#获取当前日期下一个月日期，利用当前日期加上30天
Today = datetime.date.today()
print(Today + datetime.timedelta(days=30))    # 2021-11-14

#获取当前日期上一个月的日期，利用当前日期减去30天
Today = datetime.date.today()
print(Today - datetime.timedelta(days=30))    # 2021-09-15

#获取当前日期返回明年今天的日期，利用当前日期加上365天
Today = datetime.date.today()
print(Today + datetime.timedelta(days=365))   # 2022-10-15