本文整理汇总了Python中future.backports.datetime.timezone方法的典型用法代码示例。如果您正苦于以下问题：Python datetime.timezone方法的具体用法？Python datetime.timezone怎么用？Python datetime.timezone使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类future.backports.datetime的用法示例。
在下文中一共展示了datetime.timezone方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: format_datetime
# 需要导入模块: from future.backports import datetime [as 别名]
# 或者: from future.backports.datetime import timezone [as 别名]
def format_datetime(dt, usegmt=False):
"""Turn a datetime into a date string as specified in RFC 2822.
If usegmt is True, dt must be an aware datetime with an offset of zero. In
this case 'GMT' will be rendered instead of the normal +0000 required by
RFC2822. This is to support HTTP headers involving date stamps.
"""
now = dt.timetuple()
if usegmt:
if dt.tzinfo is None or dt.tzinfo != datetime.timezone.utc:
raise ValueError("usegmt option requires a UTC datetime")
zone = 'GMT'
elif dt.tzinfo is None:
zone = '-0000'
else:
zone = dt.strftime("%z")
return _format_timetuple_and_zone(now, zone) 示例2: parsedate_to_datetime
# 需要导入模块: from future.backports import datetime [as 别名]
# 或者: from future.backports.datetime import timezone [as 别名]
def parsedate_to_datetime(data):
_3to2list = list(_parsedate_tz(data))
dtuple, tz, = [_3to2list[:-1]] + _3to2list[-1:]
if tz is None:
return datetime.datetime(*dtuple[:6])
return datetime.datetime(*dtuple[:6],
tzinfo=datetime.timezone(datetime.timedelta(seconds=tz))) 示例3: localtime
# 需要导入模块: from future.backports import datetime [as 别名]
# 或者: from future.backports.datetime import timezone [as 别名]
def localtime(dt=None, isdst=-1):
"""Return local time as an aware datetime object.
If called without arguments, return current time. Otherwise *dt*
argument should be a datetime instance, and it is converted to the
local time zone according to the system time zone database. If *dt* is
naive (that is, dt.tzinfo is None), it is assumed to be in local time.
In this case, a positive or zero value for *isdst* causes localtime to
presume initially that summer time (for example, Daylight Saving Time)
is or is not (respectively) in effect for the specified time. A
negative value for *isdst* causes the localtime() function to attempt
to divine whether summer time is in effect for the specified time.
"""
if dt is None:
return datetime.datetime.now(datetime.timezone.utc).astimezone()
if dt.tzinfo is not None:
return dt.astimezone()
# We have a naive datetime. Convert to a (localtime) timetuple and pass to
# system mktime together with the isdst hint. System mktime will return
# seconds since epoch.
tm = dt.timetuple()[:-1] + (isdst,)
seconds = time.mktime(tm)
localtm = time.localtime(seconds)
try:
delta = datetime.timedelta(seconds=localtm.tm_gmtoff)
tz = datetime.timezone(delta, localtm.tm_zone)
except AttributeError:
# Compute UTC offset and compare with the value implied by tm_isdst.
# If the values match, use the zone name implied by tm_isdst.
delta = dt - datetime.datetime(*time.gmtime(seconds)[:6])
dst = time.daylight and localtm.tm_isdst > 0
gmtoff = -(time.altzone if dst else time.timezone)
if delta == datetime.timedelta(seconds=gmtoff):
tz = datetime.timezone(delta, time.tzname[dst])
else:
tz = datetime.timezone(delta)
return dt.replace(tzinfo=tz)