Python Tkinter Canvas Objects?

Question

Python

The code:

from tkinter import*
from PIL import ImageTk, Image
from tkinter import Canvas
import random
import time
root=Tk()
root.geometry("700x700")
canvas=Canvas()
canvas.pack(fill=BOTH, expand=1)
def rect():
    x=random.randint(10, 690)
    y=random.randint(10, 100)
    x2=random.randint(60, 290)
    y2=random.randint(60, 200)
    canvas.create_rectangle(
        x, y, x2, y2,
        outline="#f11", fill="red", width=5
    )
    for meow in range(100000):
        canvas.move(1, 0, 1)
        time.sleep(0.01)
        canvas.update()
 
def istr():   
    i=PhotoImage(file='C:\Python\\istrebitel.gif')
    i=i.subsample(3, 3)
    canvas.create_image(200, 200, anchor=NW, image=i)
    
    def movetriangle(event):
        if event.keysym=='Up':
            canvas.move(1, 0, -7)
        elif event.keysym=='Down':
            canvas.move(1, 0, 7)
        elif event.keysym=='Left':
            canvas.move(1, -7, 0)
        elif event.keysym=='Right':
            canvas.move(1, 7, 0)
    canvas.bind_all('<KeyPress-Up>', movetriangle)
    canvas.bind_all('<KeyPress-Down>', movetriangle)
    canvas.bind_all('<KeyPress-Left>', movetriangle)
    canvas.bind_all('<KeyPress-Right>', movetriangle)
    canvas.mainloop()

istr()
rect()

If you run this code, then it will be possible to control the second object, but the red rectangle will disappear.
And I need the red rectangle to fall down, but so that the second object can be controlled (istrebitel.gif)
How can I do this?

Answer 1

As long as the main window loop is enabled, all binds will fire. You cannot edit this cycle with your functions. Then the window.update() method comes to the rescue. As a result, you end up with something like this:

canvas.bind(...)
canvas.bind(...)
while play:
    root.update()

Drawing objects must be done before the cycle,