Tkinter

Tkinter is a Python API for the Tk GUI. It is built into the Python standard library and is cross platform.

Images

To display an image, create a tk.Canvas and then use canvsa.create_image.

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Example

import tkinter as tk
from PIL import Image, ImageTk
import requests

image_url = 'https://via.placeholder.com/256/0000FF/'
image = Image.open(requests.get(image_url, stream=True).raw)
window = tk.Tk()
main_frame = tk.Frame(window)
main_frame.pack()
canvas = tk.Canvas(main_frame,
                   width=image.size[0],
                   height=image.size[1])
canvas.pack()
photo_img = ImageTk.PhotoImage(image=image)
canvas_image = canvas.create_image(0, 0, image=photo_img, anchor=tk.NW)
window.mainloop()

# To update the image later on..
image_url2 = 'https://via.placeholder.com/256/FF00FF/'
image2 = Image.open(requests.get(image_url, stream=True).raw)
photo_img = ImageTk.PhotoImage(image=image2)
canvas.itemconfigure(canvas_image, image=photo_img)

Notes

• Make sure the ImageTk.PhotoImage does not get garbage collected.

Animation Loop

For interactive applications, you may want an animation loop called every few milliseconds.
To accomplish this, use .after.

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Example

import tkinter as tk
import time

last_time = time.time()


def animation_loop():
    global last_time
    now = time.time()
    delta_time = now - last_time
    print("Time elapsed", delta_time)
    last_time = now
    window.after(1, animation_loop)


window = tk.Tk()
animation_loop()
window.mainloop()