如何从时区获取UTC偏移值？ [英] how to get UTC offset value from timezone?

问题描述

在我的Django项目中，我有一个表单 （forms.py） ，它实现了pytz来获取当前时区，如下所示：

In my Django project, I have a form (forms.py) which implements pytz to get current timezone like this:

tz = timezone.get_current_timezone()

我已经将此值传递给一个表单域作为初始值，如下所示：

and I have passed this value to a form field as an initial value like this:

timezone = forms.CharField(label='Time Zone', initial=tznow)

这个字段是当前时区的默认值，我的情况，它恰好是亚洲/加尔各答。

which gives the field a default value of current Timezone, in my case, it happens to be Asia/Calcutta.

现在我想找到给定时区的UTC偏移值，在这里case 亚洲/加尔各答是 +5：30

Now i want to find the UTC Offset value for the given Timezone, which in this case Asia/Calcutta is +5:30

我也尝试过tzinfo（）方法，但我couldn找不到预期的结果。有人可以指导我完成这个吗？

I tried tzinfo() method as well, but i couldn't find the expected result. Can somebody guide me through this?

推荐答案

UTC偏移由utcoffset方法作为timedelta作为tzinfo的任何实现作为pytz。例如：

The UTC offset is given as a timedelta by the utcoffset method of any implementation of tzinfo such as pytz. For example:

import pytz
import datetime

tz = pytz.timezone('Asia/Calcutta')
dt = datetime.datetime.utcnow()

offset_seconds = tz.utcoffset(dt).seconds

offset_hours = offset_seconds / 3600.0

print "{:+d}:{:02d}".format(int(offset_hours), int((offset_hours % 1) * 60))
# +5:30

这篇关于如何从时区获取UTC偏移值？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！