求帮助，这个简单的程序哪出问题了吗?

这是一个投掷骰子的图标程序

dies.py

die_visual

我反复读程序好像并未发现程序错误

求帮助，这个简单的程序哪出问题了吗?
感谢感谢！

导入的库有问题吧

For example, NoReturn wasn't added until 3.6.2
升级到3.6.2
some types aren't available in 3.6.0 · Issue #4040 · pallets/flask · GitHub For example, NoReturn wasn't added until 3.6.2. Replace any such types with typing_extensions. See https://github.com/asottile/flake8-typing-imports/blob/d1f8e340dcc2c22d844e1f5eba3248629185c426/flake8_typing_imports.py#L234-L248 for a l... https://github.com/pallets/flask/issues/4040