Last Updated : 29 Nov, 2024
If we want to unmap any widget from the screen or toplevel then forget() method is used. There are two types of forget method pack_forget() ( similar to forget() ) and grid_forget() which are used with pack() and grid() method respectively.
pack_forget() method -
Syntax: widget.pack_forget()widget can be any valid widget which is visible.
Code #1:
Python
# Imports tkinter and ttk module
from tkinter import *
from tkinter.ttk import *
# toplevel window
root = Tk()
# method to make widget invisible
# or remove from toplevel
def forget(widget):
# This will remove the widget from toplevel
# basically widget do not get deleted
# it just becomes invisible and loses its position
# and can be retrieve
widget.forget()
# method to make widget visible
def retrieve(widget):
widget.pack(fill = BOTH, expand = True)
# Button widgets
b1 = Button(root, text = "Btn 1")
b1.pack(fill = BOTH, expand = True)
# See, in command forget() method is passed
b2 = Button(root, text = "Btn 2", command = lambda : forget(b1))
b2.pack(fill = BOTH, expand = True)
# In command retrieve() method is passed
b3 = Button(root, text = "Btn 3", command = lambda : retrieve(b1))
b3.pack(fill = BOTH, expand = True)
# infinite loop, interrupted by keyboard or mouse
mainloop()
Output:
After forget
After retrieval
Notice
the difference in the position of Button 1 before and after forget as well as after retrieval.
grid_forget() method -Syntax: widget.grid_forget()
widget can be any valid widget which is visible.
Note :
This method can be used only with grid() geometry methods.
Code #2:
Python
# Imports tkinter and ttk module
from tkinter import *
from tkinter.ttk import *
# toplevel window
root = Tk()
# method to make widget invisible
# or remove from toplevel
def forget(widget):
# This will remove the widget from toplevel
# basically widget do not get deleted
# it just becomes invisible and loses its position
# and can be retrieve
widget.grid_forget()
# method to make widget visible
def retrieve(widget):
widget.grid(row = 0, column = 0, ipady = 10, pady = 10, padx = 5)
# Button widgets
b1 = Button(root, text = "Btn 1")
b1.grid(row = 0, column = 0, ipady = 10, pady = 10, padx = 5)
# See, in command forget() method is passed
b2 = Button(root, text = "Btn 2", command = lambda : forget(b1))
b2.grid(row = 0, column = 1, ipady = 10, pady = 10, padx = 5)
# In command retrieve() method is passed
b3 = Button(root, text = "Btn 3", command = lambda : retrieve(b1))
b3.grid(row = 0, column = 2, ipady = 10, pady = 10, padx = 5)
# infinite loop, interrupted by keyboard or mouse
mainloop()
Output:
After Forget
After Retrieval
Notice that the position of Button 1 remains same after forget and retrieval. With grid_forget() method, you can place it at any grid after retrieval but generally, the original grid is chosen.
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