Python pytz - 将 UTC 和时区转换为本地时间
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/25264811/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
pytz - Converting UTC and timezone to local time
提问by Tzach
I have a datetimein utc time zone, for example:
我有一个datetimeUTC 时区，例如：
utc_time = datetime.datetime.utcnow()
And a pytz timezone object:
和一个 pytz 时区对象：
tz = timezone('America/St_Johns')
What is the proper way to convert utc_timeto the given timezone?
转换utc_time为给定时区的正确方法是什么？
采纳答案by Tzach
I think I got it:
我想我明白了：
pytz.utc.localize(utc_time, is_dst=None).astimezone(tz)
This line first converts the naive (time zone unaware) utc_timedatetimeobject to a datetimeobject that contains a timezone (UTC). Then it uses the astimezonefunction to adjust the time according to the requested time zone.
此行首先将原始（不知道时区）utc_timedatetime对象转换为datetime包含时区 (UTC)的对象。然后它使用该astimezone函数根据请求的时区调整时间。
回答by xbello
May I recommend to use arrow? If I understood the question:
我可以推荐使用arrow吗？如果我理解这个问题：
>>> import arrow
>>> utc = arrow.utcnow()
>>> utc
<Arrow [2014-08-12T13:01:28.071624+00:00]>
>>> local = utc.to("America/St_Johns")
>>> local
<Arrow [2014-08-12T10:31:28.071624-02:30]>
You can also use
你也可以使用
tz.fromutc(utc_time)
回答by N Randhawa
Another very easy way:
另一个非常简单的方法：
Because utcnowmethod returns a naiveobject, so you have to convert the naiveobject into awareobject. Using replacemethod you can convert a naiveobject into awareobject. Then you can use the astimezonemethod to create new datetime object in a different time zone.
因为utcnow方法返回一个naive对象，所以你必须将naive对象转换成aware对象。使用replace方法，您可以将原始对象转换为感知对象。然后您可以使用该astimezone方法在不同的时区创建新的日期时间对象。
from datetime import datetime
import pytz
utc_time = datetime.utcnow()
tz = pytz.timezone('America/St_Johns')
utc_time =utc_time.replace(tzinfo=pytz.UTC) #replace method
st_john_time=utc_time.astimezone(tz) #astimezone method
print(st_john_time)
回答by awaik
You can also use the sample below, I use it for similar task
您也可以使用下面的示例，我将它用于类似的任务
tz = pytz.timezone('America/St_Johns')
time_difference=tz.utcoffset(utc_time).total_seconds() #time difference between UTC and local timezones in 5:30:00 format
utc_time = date + timedelta(0,time_difference)
It works fast and you don't need to import additional libraries.
它运行速度很快，您无需导入额外的库。
回答by user8808265
回答by paolov
I agree with Tzach's answer. Just wanted to include that the is_dst parameter is not required:
我同意 Tzach 的回答。只是想包括不需要 is_dst 参数：
pytz.utc.localize(datetime.utcnow()).astimezone(tz)
That code converts the current UTC time to a timezone aware current datetime.
该代码将当前 UTC 时间转换为时区感知的当前日期时间。
Whereas the code below converts the current UTC time to a timezone aware datetime which is not necessarily current. The timezone is just appended into the UTC time value.
而下面的代码将当前的 UTC 时间转换为不一定是当前的时区感知日期时间。时区只是附加到 UTC 时间值中。
tz.localize(datetime.utcnow())
