How to randomly place images in a tkinter canvas grid

I'm trying to create a game where images are placed in random cells of a grid. I had managed to create a grid and I tried to use that in order to randomly place the images but it does not seem to work as I would like it to.

try:
    import tkinter as tk
    from tkinter import ttk 
    from tkinter.ttk import *
except ImportError:
    import Tkinter as tk
    from Tkinter import ttk 
    from Tkinter.ttk import *
import random
from random import randint

window = tk.Tk() 
style = ttk.Style(window) 
style.configure("BW.TLabel")
game_frame = tk.Frame(window)
game_grid = tk.Canvas(game_frame, width=450, height=450, borderwidth=0,
                      highlightthickness=0)

def grid_create():
    global row, col, cell_width, cell_height, rect, rows , columns
    rows = 8 
    columns = 8 
    cell_width = 50 
    cell_height = 50 
    rect = {}
    for i in (game_grid, game_frame):
        i.pack()
    for column in range(8):
        for row in range(8):
            x1 = column*cell_width 
            y1 = row * cell_height 
            x2 = x1 + cell_width 
            y2 = y1 + cell_height 
            rect[row,column] = game_grid.create_rectangle(x1,y1,x2,y2,
                                                       fill="green",
                                                          tags="rect")
    grid_draw()
def grid_draw():
    global row, col
    game_grid.itemconfig("rect", fill="green")
    for i in range(8): 
        row = random.randint(0,8)
        col = random.randint(0,8)
    create_objects()
def create_objects():
    rows = 8 
    columns = 8 
    cell_width = 50 
    cell_height = 50 
    bandits = 5
    bandit_list = {}
    bandit_img = tk.PhotoImage(file="Bandit.png")

    for column in range(randint(0,8)):
        for row in range(randint(0,8)):
            x1 = column*cell_width + 22
            y1 = row * cell_height - 22
            x2 = x1 + cell_width 
            y2 = y1 + cell_height 
            bandit_list[row, column] = game_grid.create_image(x1, y2,
                                                              image=bandit_img)
    for i in range(randint(0,5)):
        row = random.randint(0,8)
        col = random.randint(0,8)
grid_create()
window.mainloop() 

I only want five 'bandits' to be displayed in random cells - hence the bandits = 5 - but I can't seem to figure out how to do this. I also do not want any of the 'bandits' to overlap. Any help is appreciated.

Image: Link to image as I do not have the required reputation to embed it here.