How to create a Tkinter error message box?

The Tkinter library has many built-in functions and methods which can be used to implement the functional part of an application. We can use messagebox module in Tkinter to create various popup dialog boxes. The messagebox property has different types of built-in popup windows that the users can use in their applications.

If you need to display the error messagebox in your application, you can use showerror("Title", "Error Message") method. This method can be invoked with the messagebox itself.

Example

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

# Create an instance of tkinter frame or window
win = Tk()

# Set the size of the tkinter window
win.geometry("700x350")

# Define a function to show the error message
def on_click():
   messagebox.showerror('Python Error', 'Error: This is an Error Message!')

# Create a label widget
label = Label(win, text="Click the button to show the message ",
font=('Calibri 15 bold'))
label.pack(pady=20)


# Create a button to delete the button
b = Button(win, text="Click Me", command=on_click)
b.pack(pady=20)

win.mainloop()