PyQt and Tkinter are two popular libraries in Python for building graphical user interfaces (GUIs)。Here’s a comparison of their features，advantages，and disadvantages to help you choose between them：

Origin & Background：

Tkinter：Tkinter is the standard GUI library for Python and has been around for a very long time。It provides a simple way to create windows，dialogs，buttons，and other GUI elements。It’s based on the Tk GUI toolkit。
PyQt：PyQt is a set of Python bindings for the Qt libraries。Qt is a free and open-source widget toolkit for creating graphical user interfaces。
Learning Curve：

Tkinter：Generally considered easier for beginners due to its simplicity and being included with most Python installations。
PyQt：Has a steeper learning curve than Tkinter，but it offers more widgets and advanced functionalities。
Look and Feel：

Tkinter：Has a more basic look and might not feel as modern or native on all platforms。However，with some effort，decent-looking interfaces can be built。
PyQt：Provides a more modern and native look on different platforms due to the power of the underlying Qt framework。
Features：

Tkinter：Provides basic widgets and functionalities for GUI development。Suitable for simple applications。
PyQt：Offers a wider variety of widgets，as well as advanced features such as 2D and 3D graphics，networking support，and more。
Extensibility：

Tkinter：More limited in terms of features and extensibility。
PyQt：Has a richer set of modules and can be extended further using other parts of the Qt framework。
Licensing：

Tkinter：It’s open-source and free to use for any purpose。
PyQt：Commercial and GPL-licensed versions are available。For proprietary applications，a commercial license is needed，which can be costly。An alternative is PySide，which provides the same functionality as PyQt but under a more permissive LGPL license。
Performance：

Tkinter：Adequate for simple applications but might be limited for more complex，resource-intensive GUIs。
PyQt：Generally offers better performance and responsiveness，especially for more complex applications。
Community & Support：

Tkinter：Has been around for a long time，so there are plenty of resources available，but it might not be as active as newer frameworks。
PyQt：Has a strong community，with a lot of resources，tutorials，and support due to the popularity of the Qt framework itself。
Conclusion：

If you are just starting with GUI development or need to whip up a quick and simple interface for a script or small application，Tkinter might be the better choice。

If you’re building a more complex，feature-rich application or want a modern look and feel，PyQt (or PySide) would likely be a better fit。