Creating a Functional Login Page in Tkinter: A Python Tkinter Tutorial (Part 19)

In this tutorial, we will learn how to create a functional login page using Tkinter in Python. A login page is an essential feature for many applications as it provides a secure way for users to access their accounts. We will create a simple login page with a username and password field where the user can enter their credentials and click on the login button to verify them.

To get started, make sure you have Python and Tkinter installed on your system. If you don’t have Tkinter installed, you can install it using the following command:

pip install tk

Now, let’s create a new Python file and import the necessary modules:

import tkinter as tk
from tkinter import messagebox

Next, let’s create a new class for our login page:

class LoginPage(tk.Tk):
    def __init__(self):
        super().__init__()

        self.title("Login Page")
        self.geometry("300x150")

        self.create_widgets()

    def create_widgets(self):
        self.label_username = tk.Label(self, text="Username:")
        self.label_username.pack()

        self.entry_username = tk.Entry(self)
        self.entry_username.pack()

        self.label_password = tk.Label(self, text="Password:")
        self.label_password.pack()

        self.entry_password = tk.Entry(self, show="*")
        self.entry_password.pack()

        self.button_login = tk.Button(self, text="Login", command=self.login)
        self.button_login.pack()

    def login(self):
        username = self.entry_username.get()
        password = self.entry_password.get()

        # Placeholder code for validation
        if username == "admin" and password == "password":
            messagebox.showinfo("Success", "Login successful!")
        else:
            messagebox.showerror("Error", "Invalid username or password")

In the create_widgets method, we create labels and entry fields for the username and password. We also create a login button that calls the login method when clicked.

In the login method, we retrieve the values entered in the username and password entry fields. In this example, we have used placeholder code for the validation. You can replace this code with your own validation logic to authenticate users.

Finally, let’s instantiate the LoginPage class and run the Tkinter main loop:

if __name__ == "__main__":
    app = LoginPage()
    app.mainloop()

That’s it! You have now created a functional login page using Tkinter in Python. You can customize the login page further by adding more features such as remember me checkbox, forgot password link, or a register button. Let us know if you have any questions or encounter any issues. Thank you for reading!