Python UTC datetime对象的ISO格式不包括Z（Zulu或零偏移量）

Question

>>> datetime.datetime.utcnow().isoformat()
'2013-10-29T09:14:03.895210'

而在javascript中

>>>  console.log(new Date().toISOString()); 
2013-10-29T09:38:41.341Z

Answer 1

from datetime import datetime, tzinfo, timedelta
class simple_utc(tzinfo):
    def tzname(self,**kwargs):
        return "UTC"
    def utcoffset(self, dt):
        return timedelta(0)

>>> datetime.utcnow().replace(tzinfo=simple_utc()).isoformat()
'2014-05-16T22:51:53.015001+00:00'