How do you press a button in python?

The Button widget is used to add buttons in a Python application. These buttons can display text or images that convey the purpose of the buttons. You can attach a function or a method to a button which is called automatically when you click the button.

Syntax

Here is the simple syntax to create this widget −

w = Button [ master, option=value, ... ]

Parameters

• master − This represents the parent window.

• options − Here is the list of most commonly used options for this widget. These options can be used as key-value pairs separated by commas.

Methods

Following are commonly used methods for this widget −

Example

Try the following example yourself −

import Tkinter
import tkMessageBox

top = Tkinter.Tk[]

def helloCallBack[]:
   tkMessageBox.showinfo[ "Hello Python", "Hello World"]

B = Tkinter.Button[top, text ="Hello", command = helloCallBack]

B.pack[]
top.mainloop[]

When the above code is executed, it produces the following result −

python_gui_programming.htm

The Tkinter button widget can be used to perform a specific actionable event within the application. We can also invoke the button widget without performing a click operation on it. The invoke[] method in Tcl/Tk does the same thing which returns a string in case if there are any commands given to the Button. The invoke[] method can be called up after the initialization of the Button widget. The event will be called automatically once the Button widget is prepared.

Example

# Import the required libraries
from tkinter import *
from tkinter import ttk
from tkinter import messagebox

# Create an instance of tkinter frame
win = Tk[]

# Set the size of the tkinter window
win.geometry["700x350"]

def display_msg[]:
   messagebox.showinfo["Message", "Hello There! Greeting from TutorialsPoint."]

# Add a Button widget
b1 = ttk.Button[win, text="Click Me", command=display_msg]
b1.pack[pady=30]
b1.invoke[]

win.mainloop[]

Output

Running the above code will show up a popup message box automatically. When we click the Button, the popup will appear from the main window.

Updated on 08-Jun-2021 07:23:24

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