Python | focus_set() and focus_get() method

Tkinter has a number of widgets to provide functionality in any GUI. It also supports a variety of universal widget methods which can be applied on any of the widget.
focus_get() and focus_set() methods are also universal widget methods. They can also be applied on Tk() method.

focus_set() method-

This method is used to set the focus on the desired widget if and only if the master window is focused.

Syntax:

widget.focus_set()

Below is the Python program-

# Importing tkinter module
# and all functions
from tkinter import *
from tkinter.ttk import *

# creating master window
master = Tk()

# Entry widget
e1 = Entry(master)
e1.pack(expand = 1, fill = BOTH)

# Button widget which currently has the focus
e2 = Button(master, text ="Button")

# here focus_set() method is used to set the focus
e2.focus_set()
e2.pack(pady = 5)

# Radiobuton widget
e3 = Radiobutton(master, text ="Hello")
e3.pack(pady = 5)

# Infinite loop
mainloop()

Output:

You may observe in above image that Button widget has the focus. For better understanding copy and run above program.

focus_get() method-

This method returns the name of the widget which currently has the focus.

Syntax:

master.focus_get()

Note: You can use it with any of the widget, master in not necessary.

Below is the Python program –

# Importing tkinter module
# and all functions
from tkinter import *
from tkinter.ttk import *

# creating master window
master = Tk()

# This method is used to get
# the name of the widget
# which currently has the focus
# by clicking Mouse Button-1
def focus(event):
    widget = master.focus_get()
    print(widget, "has focus")

# Entry widget
e1 = Entry(master)
e1.pack(expand = 1, fill = BOTH)

# Button Widget
e2 = Button(master, text ="Button")
e2.pack(pady = 5)

# Radiobutton widget
e3 = Radiobutton(master, text ="Hello")
e3.pack(pady = 5)

# Here function focus() is binded with Mouse Button-1
# so every time you click mouse, it will call the
# focus method, defined above
master.bind_all("<Button-1>", lambda e: focus(e))

# infinite loop
mainloop()

Output: Every time you click on any widget OR if you click the mouse button-1 above program will print the name of the widget which has the focus. For better understanding copy and run above program.

.!radiobutton has focus
.!entry has focus
.!button has focus