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 cross-platform file synchronization tool developed with Python and Tkinter, supporting multi-configuration management, real-time sync, system tray mode, intuitive GUI, and one-click packaging.
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