Python 2.7 time.sleep() with Canvas Tkinter (OS X)

Question

I am making program in Python 2.7 using Tkinter and I want to create 3 sec intro. The intro is just canvas image that should show for 3 seconds and then be deleted. The problem is that my program is launching 3 seconds and then the code is done, so there is no intro. I read that it is because of output buffering. I don't know how to disable it, because everyone is talking about time.sleep and print function. That's my code:

 root = Tk()
 root.resizable(0,0)
 root.geometry('800x600+200+200')

 #canvas UI
 w = Tkinter.Canvas(root, bd=0, height=600, width=800)

 def intro():
     w.pack()
     intro = Tkinter.PhotoImage(file=r'intro.ppm')
     root.intro = intro
     w.create_image((0,0), image=intro, anchor='nw', tags=("intro"))
     time.sleep(3)
     w.delete("intro")

 intro()

 w.pack()

 root.mainloop ()

Rob Murray · Accepted Answer · 2016-04-23T17:54:42.677

1

You must not use time.sleep with Tkinter. When you want the program to pause, use after.

def intro():
    w.pack()
    intro = Tkinter.PhotoImage(file=r'intro.ppm')
    root.intro = intro
    w.create_image((0,0), image=intro, anchor='nw', tags=("intro"))
    w.after(3000, w.delete, "intro")

edited Apr 23 '16 at 17:54

answered Apr 23 '16 at 12:29

Rob Murray

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I think you mean `w.after(3000, w.delete, "intro")` – Tadhg McDonald-Jensen Apr 23 '16 at 17:53
@TadhgMcDonald-Jensen Thanks, edited answer. – Rob Murray Apr 23 '16 at 17:55

Python 2.7 time.sleep() with Canvas Tkinter (OS X)

1 Answers1