将 timedelta 转换为年？ - Convert timedelta to years?

问题：

I need to check if some number of years have been since some date.我需要检查自某个日期以来是否已经过了几年。 Currently I've got timedelta from datetime module and I don't know how to convert it to years.目前我从datetime模块获得了timedelta ，但我不知道如何将其转换为年份。

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解决方案：

参考一： https://en.stackoom.com/question/3DDZ
参考二： https://stackoom.com/question/3DDZ