PythonComparisonBeginner · 4 min read

Tkinter vs PyQt in Python: Key Differences and When to Use Each

Tkinter is Python's built-in, simple GUI toolkit ideal for small apps, while PyQt is a powerful, feature-rich library based on Qt for complex, professional interfaces. Choose Tkinter for quick, lightweight projects and PyQt for advanced, polished applications.

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Quick Comparison

Here is a quick side-by-side look at the main differences between Tkinter and PyQt.

Factor	Tkinter	PyQt
Origin	Built-in Python standard library	Third-party library based on Qt framework
Ease of Use	Simple and easy for beginners	Steeper learning curve, more complex
Features	Basic widgets and layouts	Rich widgets, advanced features, animations
Look and Feel	Native but basic UI	Modern, customizable, native-like UI
Licensing	Completely free and open source	GPL or commercial license required for closed source
Performance	Lightweight, fast for small apps	More resource-heavy but powerful

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Key Differences

Tkinter comes bundled with Python, so you don't need to install anything extra. It offers a straightforward way to create simple windows, buttons, and labels. Its widget set is limited but enough for basic apps or learning GUI programming.

PyQt is a set of Python bindings for the Qt application framework. It provides a wide range of widgets, tools, and features like graphics, networking, and threading support. This makes it suitable for building complex and professional desktop applications.

Another big difference is licensing. Tkinter is fully free with no restrictions. PyQt is available under GPL, which means if you distribute your app, you must share your source code unless you buy a commercial license. This can affect your choice depending on your project goals.

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Code Comparison

Here is a simple example showing how to create a window with a button that prints a message when clicked using Tkinter.

python

import tkinter as tk

def on_click():
    print('Button clicked!')

root = tk.Tk()
root.title('Tkinter Example')

button = tk.Button(root, text='Click Me', command=on_click)
button.pack(padx=20, pady=20)

root.mainloop()

Output

A window titled 'Tkinter Example' appears with a button labeled 'Click Me'. Clicking the button prints 'Button clicked!' in the console.

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PyQt Equivalent

The same window and button using PyQt looks like this:

python

from PyQt6.QtWidgets import QApplication, QWidget, QPushButton, QVBoxLayout
import sys

def on_click():
    print('Button clicked!')

app = QApplication(sys.argv)
window = QWidget()
window.setWindowTitle('PyQt Example')

layout = QVBoxLayout()
button = QPushButton('Click Me')
button.clicked.connect(on_click)
layout.addWidget(button)
window.setLayout(layout)
window.show()

sys.exit(app.exec())

Output

A window titled 'PyQt Example' appears with a button labeled 'Click Me'. Clicking the button prints 'Button clicked!' in the console.

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When to Use Which

Choose Tkinter when you want to build simple, lightweight desktop apps quickly without extra installations or licensing worries. It is perfect for beginners and small tools.

Choose PyQt when you need a modern, feature-rich interface with advanced widgets and customization. It suits professional applications where look, feel, and functionality matter, and you are okay with its licensing terms.

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Key Takeaways

Tkinter is best for simple, quick GUI apps with no extra setup.

PyQt offers a powerful, modern toolkit for complex and polished interfaces.

Tkinter is fully free and included with Python; PyQt requires GPL or commercial license.

PyQt has a steeper learning curve but more features and customization.

Pick Tkinter for learning or small projects, PyQt for professional desktop apps.