Pythonunix时间戳转换和时区-Pythonunixtimestampconversionandtimezone

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Subtract datetime.timedelta(secOnds=15*60).

减去datetime.timedelta（秒= 15 * 60）。

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The online docs have a handy table (what you call "unix time" is more properly called "UTC", for "Universal Time Coordinate", and "seconds since the epoch" is a "timestamp" as a float...):

在线文档有一个方便的表（你称之为“unix时间”更恰当地称为“UTC”，“世界时间坐标”，“自纪元以来的秒”是“时间戳”作为浮点数...）：

Use the following functions to convert between time representations:

使用以下函数在时间表示之间进行转换：

From                        To                           Use

seconds since the epoch     struct_time in UTC           gmtime()

seconds since the epoch     struct_time in local time    localtime()

struct_time in UTC          seconds since the epoch      calendar.timegm()

struct_time in local time   seconds since the epoch      mktime()

where the unqualified function names come from the time module (since that's where the docs are;-). So, since you apparently start with a struct_time in UTC, use calendar.timegm() to get the timestamp (AKA "seconds since the epoch"), subtract 15 * 60 = 900 (since the units of measure are seconds), and put the resulting "seconds since the epoch" back into a struct_time in UTC with time.gmtime. Or, use time.mktime and time.localtime if you prefer to work in local times (but that might give problem if the 15 minutes can straddle the instant in which it switches to DST or back -- always working in UTC is much sounder).

其中不合格的函数名称来自时间模块（因为那是文档的位置;-)。因此，由于您显然以UTC中的struct_time开头，因此使用calendar.timegm（）来获取时间戳（AKA“自纪元以来的秒数”），减去15 * 60 = 900（因为度量单位是秒），然后放入生成的“自纪元以来的秒数”返回UTC中的struct_time，时间为time.gmtime。或者，如果你喜欢在当地时间工作，请使用time.mktime和time.localtime（但如果15分钟可以跨越它切换到DST或返回的瞬间，那么这可能会产生问题 - 总是在UTC工作时更加健全） 。

Of course, to use calendar.timegm, you'll need an import calendar in your code (imports are usually best placed at the top of the script or module).

当然，要使用calendar.timegm，您需要在代码中使用导入日历（导入通常最好放在脚本或模块的顶部）。

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Scroll down and read about subtracting from a date: http://pleac.sourceforge.net/pleac_python/datesandtimes.html

向下滚动并阅读从日期中减去的内容：http：//pleac.sourceforge.net/pleac_python/datesandtimes.html