How to see if a widget exists in Tkinter?

Question

Now, I know that you can check to see if a window exists by:

x.winfo_exists()

Which returns a Boolean. I have searched for this, but haven't been able to find exactly what I am looking for. More specifically I need to check the existence of my buttons, labels, list boxes, sliders etc.

Solution

winfo_exists returns 1 unless you have destroyed the widget, in which case it returns 0. This method can be called on any widget class, not only the Tk root or Toplevels. Alternatively, you can get all the children of a widget with winfo_children:

>>> import Tkinter as tk
>>> root = tk.Tk()
>>> label = tk.Label(root, text="Hello, world")
>>> label.winfo_exists()
1
>>> root.winfo_children()
[<Tkinter.Label instance at 0x0000000002ADC1C8>]
>>> label.destroy()
>>> label.winfo_exists()
0
>>> root.winfo_children()
[]

Comments

[m3nda]

In case that you didn't returned frame object to "root" (or directly not being created from it) you will not be able to do label.destroy(), but u still can search and iterate over root.winfo_children() list. As example, root.winfo_children()[0].destroy() or root.winfo_children()[1].destroy() in case you have a Menu at top. Anyway it's more easy to create handles for every frame you use, plus insert every button/label/etc inside a main frame.

[Manish]

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