time.sleep() in for loop using tkinter

[CodingCabbage]

I wish to create a loop which adds images across a screen with random positions:

photo1 = PhotoImage(file=address) #Assign image to PhotoImage
    XValue = randint(0,widthOfScreen-width2) #width2 = image width
    YValue = randint(0,heightOfScreen-height2) #width2 = image height
    Label(mainGUI, background = "white", image = photo1, borderwidth = 0).place(x=XValue, y = YValue)

the code works and places the objects randomly but if i try and add a

time.sleep(1)

into the loop then the gui isnt made until the ned of the program with all images finished....

[TobyDent]

I'm not sure if they can function well together

[Gribouillis]

Don't use sleep() in gui programs. Use a timer instead (method after() in tkinter). Run this example by PyTony to see how it works.

[vegaseat]

You can also take a quick look at ...
http://www.daniweb.com/software-development/python/code/468841/tkinter-image-slide-show-python

[vegaseat]

Actually you can use time.sleep() with Tkinter but you have to use update() too ...

''' tk_image_slideshow_sleep.py
create a very simple Tkinter image slide show
using time.sleep() and root.update()
tested with Python27/33  by  vegaseat  03dec2013
'''

import time
try:
    # Python2
    import Tkinter as tk
except ImportError:
    # Python3
    import tkinter as tk

# get a series of gif images you have in the working folder
# or use full path name
image_files = [
'Slide_Farm.gif',
'Slide_House.gif',
'Slide_Sunset.gif',
'Slide_Pond.gif',
'Slide_Python.gif'
]

root = tk.Tk()
label = tk.Label(root)
label.pack()

delay = 3.2  # seconds delay between slides
for image in image_files:
    image_object = tk.PhotoImage(file=image)
    label.config(image=image_object)
    root.title(image)
    root.update()
    time.sleep(delay)

root.mainloop()

[CodingCabbage]

Thankyou