import datetime
x = datetime.datetime.now()
print(x)
#执行结果： 2021-07-08 18:25:22.430714
print(x.year) #2021
print(x.month) #7
print(x.day) #8
print(x.strftime("%A")) #Thursday
print(x.strftime("%B")) #July
print(x.strftime("%Y-%m-%d")) #2021-07-08
print(x.strftime("%Y-%m-%d %H-%M-%S")) #2021-07-08 19-02-04
print(x.strftime("%Y/%m/%d %H/%M/%S")) #2021/07/08 19/02/49
#1、获取指定日期和日间
from datetime import datetime
x = datetime(2019,7,9,14,20)
print(x)
#执行结果： 2019-07-09 14:20:00
#2、datetime转换为timestamp
x = datetime(2019,7,9,14,20)
dt = x.timestamp()
print(dt)
#执行结果：1562653200.0
#3、timestamp转换为datetime
x = 1562653200.0
dt = datetime.fromtimestamp(x) #本地时间
print(dt)
#执行结果： 2019-07-09 14:20:00
#4、timestamp转换为UTC标准时区的时间
x = 1562653200.0
dt = datetime.utcfromtimestamp(x) #UTC时间
print(dt)
#5、将字符串格式的时间转换为datetime
dt1 = datetime.strptime("2019-6-1 20:19:59", "%Y-%m-%d %H:%M:%S")
print(dt1)
print(type(dt1))
import time
#6、将时间戳转换为时间
time = int(time.time())
print(time)
print(datetime.fromtimestamp(time))
from datetime import timedelta
#昨天
yestoday = datetime.now() -timedelta(days=1)
print("昨天： "+ str(yestoday))
#明天
tommorow = datetime.now() + timedelta(days=1)
print("明天： "+str(tommorow))
#当前时间推后1小时
future =datetime.now()+ timedelta(seconds=60 * 60)
print("当前时间推后一小时: " + str(future))
#前两天
d = datetime.now() - timedelta(days=2)
print(d)
#五分钟有效期
d1 = datetime.now() + timedelta(seconds=5 * 60)
print(d1)
