Python 版本过旧：ImportError: cannot import name '_setup_dialog` from 'tkinter.simpledialog' 遇到这个报错，是因为 Python 版本太旧。 以 Python 3.9 为例，最新的 IDLE 3.9 所使用的 _setup_dialog 函数是在 Python 3.9.5 添加的。

A program to update inventory and generate invoices for a cloth store. This project was created using the Python programming language and the Integrated Development and Learning Environment of Python.