Python 将字符串的时间转换为时间戳

import time 

a1 = "2019-5-10 23:40:00"

# 先转换为时间数组

timeArray = time.strptime(a1, "%Y-%m-%d %H:%M:%S") 

# 转换为时间戳

timeStamp = int(time.mktime(timeArray))

print(timeStamp)

# 格式转换 - 转为 /

a2 = "2019/5/10 23:40:00"

# 先转换为时间数组,然后转换为其他格式

timeArray = time.strptime(a2, "%Y/%m/%d %H:%M:%S")

otherStyleTime = time.strftime("%Y/%m/%d %H:%M:%S", timeArray)

print(otherStyleTime)

# 时间加减

time = '2021-02-28'

time_lastday=(datetime.datetime.strptime(time,"%Y-%m-%d")-datetime.timedelta(days=1)).strftime("%Y-%m-%d")