不管计算机中设置的日期时间如何，都获取指定时区的日期时间 [英] Get datetime of specified timezone irrespective of datetime set in computer

问题描述

我要打印时区亚洲/加德满都" 的日期时间.我使用了以下代码:

I want to print the datetime of timezone "Asia/Kathmandu". I have used the below code:

import datetime, pytz

tz = pytz.timezone("Asia/Kathmandu")
ktm_now = datetime.datetime.now(tz)
print(ktm_now)

问题在于，它给了我在计算机中设置的日期时间，而不是亚洲/加德满都" 的日期时间.现在，亚洲/加德满都" 的日期时间应为 19:55:00 ，但我已将计算机的时间手动更改为 21:30:00 .然后，执行上述代码后，它出人意料地给了我计算机的日期时间( 21:30:00 )而不是 19:55:00 .可能是什么原因?如何获取指定时区(如亚洲/加德满都" )的日期时间，而不是计算机中设置的日期时间?

The problem is that it gave me the datetime that is set in my computer instead of datetime of "Asia/Kathmandu". Right now the datetime of "Asia/Kathmandu" should be 19:55:00 but I have manually changed the time of my computer to 21:30:00. And after doing this, as soon as I run the above code, it surprisingly gives me datetime which is of my computer (21:30:00) instead of 19:55:00. What can be the reason? How to get the datetime of a specified timezone like "Asia/Kathmandu" instead of datetime set in computer?

推荐答案

以下是一种从独立来源获取时间的方法(假设您可以访问互联网):

Here's a way how to get the time from an independent source (assuming you have internet access):

import datetime
import ntplib # pip install ntplib
import dateutil # Python 3.9: use zoneinfo

tz_info = dateutil.tz.gettz("Asia/Kathmandu")

ntp_server = 'pool.ntp.org'
c = ntplib.NTPClient()

response = c.request(ntp_server)
dt = datetime.datetime.fromtimestamp(response.tx_time, tz=tz_info)
# response.tx_time holds NTP server timestamp in seconds since the epoch / Unix time
# note that using response.tx_time here ignores network delay

print(dt)
# 2021-03-06 21:13:20.112861+05:45

print(repr(dt))
# datetime.datetime(2021, 3, 6, 21, 13, 20, 112861, tzinfo=tzfile('/usr/share/zoneinfo/Asia/Kathmandu'))

print(dt.utcoffset())
# 5:45:00

软件包: ntplib ，背景信息:

package: ntplib, background info: Network Time Protocol

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