Explain controlling layout with geometry manager pack (), place (), and grid () methods with suitable examples

In Tkinter, the geometry managers are used to organize widgets throughout the parent widget area. Tkinter provides three types of geometry manager classes: pack, grid, and place.

1. pack(): This geometry manager organizes widgets in blocks before placing them in the parent widget.

Example:

from tkinter import *
root = Tk()
Button(root, text="Button 1").pack(side=LEFT)
Button(root, text="Button 2").pack(side=TOP)
Button(root, text="Button 3").pack(side=RIGHT)
root.mainloop()

In this example, Button 1 is placed to the left, Button 2 is placed at the top, and Button 3 is placed to the right.

2. grid(): This geometry manager organizes widgets in a table-like structure in the parent widget.

Example:

from tkinter import *
root = Tk()
Label(root, text="First Name").grid(row=0)
Label(root, text="Last Name").grid(row=1)
Entry(root).grid(row=0, column=1)
Entry(root).grid(row=1, column=1)
root.mainloop()

In this example, the labels "First Name" and "Last Name" are placed in the first column of the first and second rows respectively. The entry widgets are placed in the second column of the first and second rows respectively.

3. place(): This geometry manager organizes widgets by placing them in a specific position in the parent widget.

Example:

from tkinter import *
root = Tk()
Button(root, text="Button 1").place(x=20, y=20)
Button(root, text="Button 2").place(x=40, y=40)
Button(root, text="Button 3").place(x=60, y=60)
root.mainloop()

In this example, Button 1 is placed at coordinates (20,20), Button 2 is placed at coordinates (40,40), and Button 3 is placed at coordinates (60,60).