I can’t change the title of my tkinter window. It always says “tk”.

I’m on debian 12 (bookworm) running python3.
If I use “ttk” it works. But ttk has no support for “Canvas”. There must be a way to set the title in plain tk.

Here’s my code:

import tkinter as tk
from PIL import Image, ImageTk
import cv2

window = tk.Tk()
window.geometry("1600x900")
window.title=("LABCAM")

def show_frame():
    global image_id

    ret, frame = cap.read()

    if ret:
        frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
        img = Image.fromarray(frame)
        img = img.resize((1400, 900), Image.Resampling.LANCZOS)
        photo = ImageTk.PhotoImage(image=img)
        canvas.photo = photo
        if image_id:
            canvas.itemconfig(image_id, image=photo)
        else:
            image_id = canvas.create_image((0,0), image=photo, anchor="nw")
            canvas.configure(width=photo.width(), height=photo.height())
    window.after(20, show_frame)

image_id = None

cap = cv2.VideoCapture(0)

frame_cam = tk.Frame(master=window, width=1400, height=900, bg="red")
frame_ctrl = tk.Frame(master=window, width=200, height=900, bg="blue")

frame_cam.pack(side=tk.LEFT)
frame_ctrl.pack(side=tk.RIGHT)

canvas = tk.Canvas(frame_cam)
canvas.pack(fill="both", expand=True)

show_frame()
window.mainloop()
cap.release()