import datetime
d1 = datetime.datetime.strptime('2019-03-05', '%Y-%m-%d')
d2 = datetime.datetime.strptime('2019-01-01', '%Y-%m-%d')
if d1 >= d2:
print("待执行的程序!")
date_str = “2019-05-12”
date_time = datetime.strptime(date_str, '%Y-%m-%d')
expiration_date = datetime.strptime('2000-01-01', '%Y-%m-%d') # 设定截止日期2017-01-01
if date_time >= expiration_date:
print(“执行啥”)