更改字符串的时间格式

import time
time1 = "2022-1-2 03:04:05"
time2 = time.strptime(time1,"%Y-%m-%d %H:%M:%S")
time3 = "{:02d}:{:02d}:{:02d}_{}-{:02d}-{:02d}".format(time2.tm_hour,time2.tm_min,time2.tm_sec,time2.tm_year,time2.tm_mon,time2.tm_mday)
print(time3)

import datetime

time = '2019-1-8 03:04:05'
d = datetime.datetime.strptime(time, '%Y-%m-%d %H:%M:%S')
date = d.strftime('%H:%M:%S_%Y-%m-%d')
print(date)

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