什么是RFC3339:https://zhuanlan.zhihu.com/p/31829454
>>> import datetime
>>> import time
>>> dt = datetime.datetime(2020, 2, 13, 17, 14, 56)
>>> datetime.datetime.utcfromtimestamp(
... time.mktime(
... time.strptime(
... dt.strftime('%Y-%m-%d %H:%M:%S'), '%Y-%m-%d %H:%M:%S'
... )
... )
... ).strftime('%Y-%m-%dT%H:%M:%SZ')