下面这段代码会报错:

from datetime import datetime
ts = 1571595618.0
x = datetime.utcfromtimestamp(ts)
x_ts = x.timestamp()

assert ts == x_ts, f"{ts} != {x_ts}"

换成这样就对：

from datetime import datetime, timezone
ts = 1571595618.0
x = datetime.fromtimestamp(ts, tz=timezone.utc)
x_ts = x.timestamp()

https://blog.ganssle.io/articles/2019/11/utcnow.html
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