
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.