#encoding:utf-8

from datetime import date, datetime, timedelta

day = date.today()

now = datetime.now()

delta = timedelta(days=5)

n_days_after = now + delta

n_days_forward = now - delta

print(("当前日期：{}").format(day))

print("向后推迟5天的日期：{}".format(n_days_after.strftime('%Y-%m-%d')))

print("向前推5天的日期：{}".format(n_days_forward.strftime('%Y-%m-%d')))