import datetime
import sys
def next_day(date_str):
date = datetime.datetime.strptime(date_str, '%Y-%m-%d')
date += datetime.timedelta(days=1)
return date.strftime('%Y-%m-%d')
def prev_day(date_str):
date = datetime.datetime.strptime(date_str, '%Y-%m-%d')
date += datetime.timedelta(days=-1)
return date.strftime('%Y-%m-%d')
while True:
line = sys.stdin.readline()
line = line.strip()
【python123的答案_Python123题库完美答案——获得昨天和明天的日期】if line == '':
break
print('前一天:', prev_day(line))
print('后一天:', next_day(line))
