Python 日期时间：使用具有时区感知日期的 strftime()
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Python Datetime : use strftime() with a timezone-aware date
提问by snoob dogg
Suppose I have date dlike this :
假设我有这样的约会d：
>>> d
datetime(2009, 4, 19, 21, 12, tzinfo=tzoffset(None, -7200))
As you can see, it is "timezone aware", there is an offset of 2 Hour, utctime is
如您所见，它是“时区感知”，有 2 小时的偏移量，utctime 是
>>> d.utctimetuple()
time.struct_time(tm_year=2009, tm_mon=4, tm_mday=19,
tm_hour=23, tm_min=12, tm_sec=0,
tm_wday=6, tm_yday=109, tm_isdst=0)
So, real UTC date is 19th March 2009 23:12:00, right ?
所以，真正的 UTC 日期是 2009年3 月 19 日23:12:00，对吧？
Now I need to format my date in string, I use
现在我需要用字符串格式化我的日期，我使用
>>> d.strftime('%Y-%m-%d %H:%M:%S.%f')
'2009-04-19 21:12:00.000000'
Which doesn't seems to take this offset into account. How to fix that ?
这似乎没有考虑到这个抵消。如何解决？
采纳答案by dnswlt
In addition to what @Slam has already answered:
除了@Slam 已经回答的内容：
If you want to output the UTC time without any offset, you can do
如果你想输出没有任何偏移的UTC时间，你可以这样做
from datetime import timezone, datetime, timedelta
d = datetime(2009, 4, 19, 21, 12, tzinfo=timezone(timedelta(hours=-2)))
d.astimezone(timezone.utc).strftime('%Y-%m-%d %H:%M:%S.%f')
See datetime.astimezonein the Python docs.
请参阅Python 文档中的datetime.astimezone。
回答by Slam
回答by Patrick Artner
This will convert your local time to UTC and print it:
这会将您的本地时间转换为 UTC 并打印出来：
import datetime, pytz
from dateutil.tz.tz import tzoffset
loc = datetime.datetime(2009, 4, 19, 21, 12, tzinfo=tzoffset(None, -7200))
print(loc.astimezone(pytz.utc).strftime('%Y-%m-%d %H:%M:%S.%f') )
回答by Emmanuel
I couldn't import timezone module (and hadn't much time to know why) so I set TZ environment variable which override the /etc/localtime information
我无法导入 timezone 模块（并且没有太多时间知道为什么）所以我设置了 TZ 环境变量来覆盖 /etc/localtime 信息
>>> import os
>>> import datetime
>>> print datetime.datetime.now().strftime('%Y-%m-%d %H:%M')
2019-05-17 11:26
>>> os.environ["TZ"] = "UTC"
>>> print datetime.datetime.now().strftime('%Y-%m-%d %H:%M')
2019-05-17 09:26
