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CustomTkinter is a python UI-library based on Tkinter, which provides new, modern and fully customizable widgets. They are created and used like normal Tkinter widgets and can also be used in combination with normal Tkinter elements. The widgets and the window colors either adapt to the system appearance or the manually set mode ('light', 'dark'), and all CustomTkinter widgets and windows support HighDPI scaling (Windows, macOS). With CustomTkinter you'll get a consistent and modern look across all desktop platforms (Windows, macOS, Linux).

| complex_example.py on Windows 11 with dark mode and 'blue' theme

| complex_example.py on macOS in light mode and standard 'blue' theme

Installation

Install the module with pip:

pip3 install customtkinter

Update existing installation: pip3 install customtkinter --upgrade
(update as often as possible because this library is under active development)

Documentation

The official documentation can be found in the Wiki Tab here:

--> Documentation.

Example Program

To test customtkinter you can try this simple example with only a single button:

import tkinter
import customtkinter

customtkinter.set_appearance_mode("System")  # Modes: system (default), light, dark
customtkinter.set_default_color_theme("blue")  # Themes: blue (default), dark-blue, green

app = customtkinter.CTk()  # create CTk window like you do with the Tk window
app.geometry("400x240")

def button_function():
    print("button pressed")

# Use CTkButton instead of tkinter Button
button = customtkinter.CTkButton(master=app, text="CTkButton", command=button_function)
button.place(relx=0.5, rely=0.5, anchor=tkinter.CENTER)

app.mainloop()

which results in the following window on macOS:

In the examples folder, you can find more example programs and in the Documentation you can find further information on the appearance mode, scaling, themes and all widgets.

More Examples and Showcase

Appearance mode change and scaling change

CustomTkinter can adapt to the Windows 10/11 light or dark mode:

complex_example_mode_switch_Windows.mp4

| complex_example.py on Windows 11 with system appearance mode change and standard 'blue' theme

On macOS you either need python3.10 or higher or the anaconda python version to get a dark window header (Tcl/Tk >= 8.6.9 required):

complex_example_mode_switch_scaling_macOS.mp4

| complex_example.py on macOS with system appearance mode change, user-scaling change and standard 'blue' theme

Button with images

It's possible to put an image on a CTkButton. You just have to pass a PhotoImage object to the CTkButton with the image argument. If you want no text at all you have to set text="" or you specify how to position the text and image at once with the compound option:

| image_example.py on Windows 11

Scrollable Frames

Scrollable frames are possible in vertical or horizontal orientation and can be combined with any other widgets. | scrollable_frame_example.py on Windows 11

Integration of TkinterMapView widget

In the following example I used a TkinterMapView which integrates well with a CustomTkinter program. It's a tile based map widget which displays OpenStreetMap or other tile based maps:

tkintermapview_customtkinter_Windows.mp4

| examples/map_with_customtkinter.py from TkinterMapView repository on Windows 11

You can find the TkinterMapView library and example program here: https://github.com/TomSchimansky/TkinterMapView