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python - datetime.fromtimestamp vs datetime.utcfromtimestamp,哪个使用起来更安全?

我正在从传感器收集一些数据,并从中获取时间戳,如下所示:"time":{"seconds":40,"year":115,"month":5,"hours":7,"time":1434549820776,"date":17,"minutes":3,"day":3,"timezoneOffset":420},我有一个python脚本来处理来自传感器的数据(传入数据是json格式),我获取time的值并将其转换为可读的时间格式。我使用了datetime.fromtimestamp(1434549820776/1000).strftime('%Y-%m-%d%H:%M:%S')并返回了'201