Introduction

In this blog, I am going to create an error message in a Python GUI application. When a user clicks an error item from the message menu, it will display the error message in the application screen.
Software requirement
Python 3.5 and IDLE (Python 3.5)
Programming code
  1. #Create Error Box in Python GUI Application
  2. import tkinter as tk
  3. from tkinter import ttk
  4. from tkinter import Menu
  5. from tkinter import messagebox as mbox
  6. err = tk.Tk()
  7. #Add a Title
  8. err.title("Python GUI App")
  9. #Label
  10. ttk.Label(err, text="Error Messsage BoxApp").grid(column=0,row=0,padx=20,pady=30)
  11. #Create a Menu Bar
  12. menuBar=Menu(err)
  13. err.config(menu=menuBar)
  14. #Display a Error Message Box
  15. def _msgBox():
  16. mbox.showerror('Python Error Message','Error: You are Clicked ErrorMessage')
  17. #Create Error Message Menu
  18. infoMenu=Menu(menuBar, tearoff=0)
  19. infoMenu.add_command(label="Error", command=_msgBox)
  20. menuBar.add_cascade(label="Message", menu=infoMenu)
  21. #Calling Main()
  22. err.mainloop()
About the code
  • First, I am importing the tkinter modules.
  • Next, I assign a class and variables and give the application title.
  • Next, I create a menu bar and add an item in the menu bar.
  • Next, I create an error message function and add the error message in the displaying command menu.
  • Finally, I have started the Windows event loop by calling the mainloop method, then execute the code.
Output