python中获取到今天为止两年前的日期

import time
end_time = time.strftime('%Y-%m-%d',time.localtime(time.time()))

start_year = int(time.strftime('%Y',time.localtime(time.time()))) - 2
month_day = time.strftime('%m-%d',time.localtime(time.time()))
start_time = '{}-{}'.format(start_year,month_day)import time
end_time = time.strftime('%Y-