做这个：
import time
import datetime
t = '2012-06-30T23:59:60.209215'
nofrag, frag = t.split('.')
nofrag_dt = time.strptime(nofrag, "%Y-%m-%dT%H:%M:%s")
ts = datetime.datetime.fromtimestamp(time.mktime(nofrag_dt))
dt = ts.replace(microsecond=int(frag))
print(dt)
输出为：
2012-07-01 00:00:00.209215
602392714
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