我想运行下GitHub上tensorflow关于Mnist数据集的训练代码，运行在Python 3.5.2的环境下，在Spyder上。 红色箭头所指行即为IPython console提示出错的行。

From a powerful new assignment syntax to under-the-hood overhauls, Python 3.8 steps toward a more modern Python codebase Python 3.8 is the latest version of the popular language for everything from ...