Python中实现对Timestamp和Datetime及UTC时间之间的转换
Python项目中很多时候会需要将时间在Datetime格式和TimeStamp格式之间转化，又或者你需要将UTC时间转化为本地时间，本文总结了这几个时间之间转化的函数，供大家参考。
一、Datetime转化为TimeStamp
defdatetime2timestamp(dt,convert_to_utc=False): '''ConvertsadatetimeobjecttoUNIXtimestampinmilliseconds.''' ifisinstance(dt,datetime.datetime): ifconvert_to_utc:#是否转化为UTC时间 dt=dt+datetime.timedelta(hours=-8)#中国默认时区 timestamp=total_seconds(dt-EPOCH) returnlong(timestamp) returndt
二、TimeStamp转化为Datetime
deftimestamp2datetime(timestamp,convert_to_local=False): '''ConvertsUNIXtimestamptoadatetimeobject.''' ifisinstance(timestamp,(int,long,float)): dt=datetime.datetime.utcfromtimestamp(timestamp) ifconvert_to_local:#是否转化为本地时间 dt=dt+datetime.timedelta(hours=8)#中国默认时区 returndt returntimestamp
三、当前UTC时间的TimeStamp
deftimestamp_utc_now(): returndatetime2timestamp(datetime.datetime.utcnow())
四、当前本地时间的TimeStamp
deftimestamp_now(): returndatetime2timestamp(datetime.datetime.now())
五、UTC时间转化为本地时间
#需要安装python-dateutil
#Ubuntu下：sudoapt-getinstallpython-dateutil
#或者使用PIP：sudopipinstallpython-dateutil
fromdateutilimporttz
fromdateutil.tzimporttzlocal
fromdatetimeimportdatetime
#getlocaltimezonename
printdatetime.now(tzlocal()).tzname()
#UTCZone
from_zone=tz.gettz('UTC')
#ChinaZone
to_zone=tz.gettz('CST')
utc=datetime.utcnow()
#Tellthedatetimeobjectthatit'sinUTCtimezone
utc=utc.replace(tzinfo=from_zone)
#Converttimezone
local=utc.astimezone(to_zone)
printdatetime.strftime(local,"%Y-%m-%d%H:%M:%S")
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