Python 内置了 datetime 模块来处理常见的时间操作，简单易用又功能强大！ 今天 Crossin 将带你快速上手 datetime，通过案例让你轻松掌握时间处理技巧。 1.

but the python datetime.time class doesn't seem to have defined arithmetic operators, nor does the datetime.timedelta. if there are methods for this, that's not obvious to me either: Code: ...