Validate email ID in Tkinter text box

Let’s start with the Tkinter text box, a graphical user interface (GUI) element in Python. It’s essential for building interactive software applications, allowing users to input and manipulate text. JavaScript typically serves dynamic web elements like buttons and search bars, whereas Tkinter delivers similar functionality for Python applications

Additionally, message boxes are integral to software applications, displaying warnings, notifications, and other essential information to users. They enhance user interaction by providing feedback and guidance throughout the application’s usage.

  Effective Email Validation in Tkinter Textboxes: A Step-by-Step Approach”

Now Let’s get into our code….

• First, you import  tkinter and message box  because you need them for your application.
• Then, you create a function to validate the entered email.
• Convert the email to the lower case and remove any extra spaces.
• Count the number of @ symbols and dot(.) characters in the email to check if it contains exactly one @ symbol and at least one dot(.) .
• If these criteria are not met, display an error message to ensure the email address follows the correct format .
• Now let’s check the position of @ in the given email address and storing in a variable k. Now another criterion of an email id should contain a dot(.) after @ and should end with either .com or .in we can check this after the position of @ to minimize time.
• Now the part is to check what kind of email it is (eg: like gmail, hotmail, yahoo, etc..)store all the necessary kinds of email it can.
• Extract the part of the email after the @ symbol into a list.
• Use list[0] to determine the email provider and verify it against your list of accepted domains.
• If the provider is not accepted, raise an error to inform the user about the valid email domains.
• If all the conditions are satisfying the email will be valid.

Now the tkinter part will go on

1. We need to create a main application window, from the tkinter library we have tkinter. Tk() which gives us the main window.
2. To access it assign it to a new variable let’s say it root. and then we can assign a title to it by using .title(name of the title).
3. To create a label widget that refers the heading of the search bar we have a tkinter. Label (root, text=some text) and set that heading to a certain position using .pack(pady=number).
4. To enter the email we need some widget and then the position or size of it mention them and next give a button to check whether all the instructions passed or working or not and name it and give its size or position to it

INPUT:[email protected]
output:
The entered email is a valid one

 

import tkinter as tk
from tkinter import messagebox
def validate_email():
    email = entry_email.get().strip().lower()
    a = email.count("@")
    b = email.count(".")
    if a != 1:
        messagebox.showerror("Invalid Email", "Ensure that the email contains only one '@' symbol")
        return
    if b < 1:
        messagebox.showerror("Invalid Email", "Ensure that the email contains at least one dot ('.')")
        return
    k = email.index("@")
    if "." not in email[k+1:]:
        messagebox.showerror("Invalid Email", "Ensure that there is a dot ('.') in the list part")
        return
    list = email[k+1:].split(".")
    if list[0] not in ["gmail", "outlook", "yahoo", "hotmail"]:
        messagebox.showerror("Invalid Email", "Ensure that the email is from a valid as it should contain gmail, outlook, yahoo, hotmail")
        
        return
    o=email.endswith("com")
    l=email.endswith("in")
 if not o and not l:
        messagebox.showerror("Invalid Email", "Ensure that the email ends either with '.com' or '.in'")
        return
    
    messagebox.showinfo("Valid Email", "The entered email is a valid one")

root = tk.Tk()
root.title("Email Validation")

label_instruction = tk.Label(root, text="Enter an email address to validate:")
label_instruction.pack(pady=10)

entry_email = tk.Entry(root, width=30)
entry_email.pack(pady=5)

validate_button = tk.Button(root, text="Validate Email", command=validate_email)
validate_button.pack(pady=10)

root.mainloop()

Input -Output Gif Video