正如@TimPietzcker所建议的那样,dateutil包是必经之路,它可以正确,自动地处理前三种格式:
>>> from dateutil.parser import parse
>>> parse("Fri Sep 25 18:09:49 -0500 2009")
datetime.datetime(2009, 9, 25, 18, 9, 49, tzinfo=tzoffset(None, -18000))
>>> parse("2008-06-29T00:42:18.000Z")
datetime.datetime(2008, 6, 29, 0, 42, 18, tzinfo=tzutc())
>>> parse("2011-07-16T21:46:39Z")
datetime.datetime(2011, 7, 16, 21, 46, 39, tzinfo=tzutc())
它似乎采用了unixtime格式,但是幸运的datetime.datetime
是该任务的标准是:
>>> from datetime import datetime
>>> datetime.utcfromtimestamp(float("1294989360"))
datetime.datetime(2011, 1, 14, 7, 16)
使用此函数可以轻松处理所有4种格式:
from dateutil.parser import parse
from datetime import datetime
def parse_time(s):
try:
ret = parse(s)
except ValueError:
ret = datetime.utcfromtimestamp(s)
return ret