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A supercharged theme extension for tkinter that enables on-demand modern flat style themes inspired by Bootstrap.

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ttkbootstrap

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ttkbootstrap is a Python library that enhances tkinter by providing modern, flat-style themes inspired by Bootstrap. Easily create stylish GUI applications with built-in themes, pre-defined widget styles, and more.

Documentation

👀 Check out the documentation.

Features

✔️ Built-in Themes
Over a dozen curated dark and light themes.

✔️ Pre-defined Styles:
Loads of beautiful pre-defined widget styles such as outline and round toggle buttons.

✔️ Simple keyword API:
Apply colors and types using simple keywords such as primary and striped instead of the legacy approach of primary.Striped.Horizontal.TProgressbar. If you've used Bootstrap for web development, you are already familiar with this approach using css classes.

✔️ Lots of new Widgets:
ttkbootstrap comes with several new beautifully designed widgets such as Meter, DateEntry, and Floodgauge. Additionally, dialogs are now themed and fully customizable.

✔️ Built-in Theme Creator:
Want to create your own theme? Easy! ttkboostrap includes a built-in theme creator that enables you to easily build, load, expore, and apply your own custom themes.

Installation

Install ttkbootstrap using pip in the terminal/command prompt!

python -m pip install ttkbootstrap

Simple Usage

Instead of using long, complicated ttk style classes, you can use simple keywords with the "bootstyle" parameter.

To get started, add the import statement at the top of your file in your preferred IDE:

import ttkbootstrap as ttk

Then create a window using the ttk.Window(...) and .mainloop() commands. And add a couple buttons (b1 and b2) to create your first window!

root = ttk.Window(themename="superhero")

b1 = ttk.Button(root, text="Submit", bootstyle="success")
b1.pack(side=LEFT, padx=5, pady=10)

b2 = ttk.Button(root, text="Submit", bootstyle="info-outline")
b2.pack(side=LEFT, padx=5, pady=10)

root.mainloop()

Here is the desired result:

Here is the result of the code used above:

For more detailed usage, please refer to the Getting Started page This page includes creating buttons, adding widgets, different styles and more.

The new keyword API is very flexible. The following examples all produce the same result:

  • bootstyle="info-outline"
  • bootstyle="info outline"
  • bootstyle=("info", "outline")
  • bootstyle=(INFO, OUTLINE)

Icons

Add icons to your app buttons and labels using the ttkbootstrap-icons library.

Contributing

We welcome contributions! If you'd like to contribute to ttkbootstrap, please check out our contributing guidelines.

Links

Support

This project is proudly developed with the support of the PyCharm IDE, generously provided by JetBrains.

JetBrains logo

© 2025 JetBrains s.r.o. JetBrains and the JetBrains logo are registered trademarks of JetBrains s.r.o.

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