#!/usr/bin/env python3

# -*- coding:utf-8 -*-

from datetime import datetime, timedelta, timezone

##获取当前日期和时间

now = datetime.now()

print(now)

print(type(now))

##获取指定日期和时间

dt = datetime(2015, 4, 19, 12, 20)

print(dt)

##datetime转为timestamp

print(dt.timestamp())

##timestamp转换为datetime

t = dt.timestamp()

print(datetime.fromtimestamp(t)) #本地时间

print(datetime.utcfromtimestamp(t)) #UTC时间

##str转换为datetime

cday = datetime.strptime('2015-6-1 18:19:59', '%Y-%m-%d %H:%M:%S')

print(cday)

print(type(cday))

##datetime转换为str

now = datetime.now()

print(now.strftime('%a, %b %d %H:%M'))

##datetime加减

now = datetime.now()

print(now)

now1 = now + timedelta(hours=10)

print(now1)

now2 = now - timedelta(days=1)

print(now2)

now3 = now +timedelta(days=2, hours=12)

print(now3)

##本地时间转为UTC时间

tz_utc_8 = timezone(timedelta(hours=8))

now = datetime.now()

print(now)

dt = now.replace(tzinfo=tz_utc_8) #强制设置为UTC+8:00

print(dt)

print('--------------')

##时区转换

#拿到UTC时间，并强制设置时区为UTC+0.00:

utc_dt = datetime.utcnow().replace(tzinfo=timezone.utc)

print(utc_dt)

#astimezone()将转换时区为北京时间：

bj_dt = utc_dt.astimezone(timezone(timedelta(hours=8)))

print(bj_dt)

#astimezone()将时区转换为京东时间：

tokyo_dt = utc_dt.astimezone(timezone(timedelta(hours=9)))

print(tokyo_dt)

#astimezone()将bj_dt转换时区为东京时间：

tokyo_dt2 = bj_dt.astimezone(timezone(timedelta(hours=9)))

print(tokyo_dt2)