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
def datetime2timestamp(dt, convert_to_utc=false): ''' converts a datetime object to unix timestamp in milliseconds. ''' if isinstance(dt, datetime.datetime): if convert_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) return long(timestamp) return dt
二、timestamp转化为datetime
def timestamp2datetime(timestamp, convert_to_local=false): ''' converts unix timestamp to a datetime object. ''' if isinstance(timestamp, (int, long, float)): dt = datetime.datetime.utcfromtimestamp(timestamp) if convert_to_local: # 是否转化为本地时间 dt = dt + datetime.timedelta(hours=8) # 中国默认时区 return dt return timestamp
三、当前utc时间的timestamp
def timestamp_utc_now(): return datetime2timestamp(datetime.datetime.utcnow())
四、当前本地时间的timestamp
def timestamp_now(): return datetime2timestamp(datetime.datetime.now())
五、utc时间转化为本地时间
# 需要安装python-dateutil# ubuntu下：sudo apt-get install python-dateutil# 或者使用pip：sudo pip install python-dateutilfrom dateutil import tzfrom dateutil.tz import tzlocalfrom datetime import datetime # get local time zone nameprint datetime.now(tzlocal()).tzname() # utc zonefrom_zone = tz.gettz('utc')# china zoneto_zone = tz.gettz('cst') utc = datetime.utcnow() # tell the datetime object that it's in utc time zoneutc = utc.replace(tzinfo=from_zone) # convert time zonelocal = utc.astimezone(to_zone)print datetime.strftime(local, %y-%m-%d %h:%m:%s)