How to create a message box with tkinter?

You can use the module tkMessageBox for Python 2.7 or the corresponding version for Python 3 called tkinter.messagebox.

It looks like askquestion() is exactly the function that you want. It will even return the string "yes" or "no" for you.

Here's how you can ask a question using a message box in Python 2.7. You need specifically the module tkMessageBox.

from Tkinter import *
import tkMessageBox


root = Tk().withdraw()  # hiding the main window
var = tkMessageBox.askyesno("Title", "Your question goes here?")

filename = "log.txt"

f = open(filename, "w")
f.write(str(var))
print str(var) + " has been written to the file " + filename
f.close()

You can assign the return value of the askquestion function to a variable, and then you simply write the variable to a file:

from tkinter import messagebox

variable = messagebox.askquestion('title','question')

with open('myfile.extension', 'w') as file: # option 'a' to append
    file.write(variable + '\n')

You can use message box from Tkinter using

# For python 3 or above
from tkinter import messagebox

# For python less than 3
from Tkinter import *
import tkMessageBox

Here's the basic syntax:

messagebox.Function_Name(title, message [, options])

The message boxes are modal and will return a subset of (True, False, OK, None, Yes, No) based on the user’s selection.

So to get the value of message box you just need to store the value in a variable. An example is given below:

res=mb.askquestion('Exit Application', 'Do you really want to exit')
if res == 'yes' :
    root.destroy()

There are different type of message boxes or Function_name:

1. showinfo(): Show some relevant information to the user.
2. showwarning(): Display the warning to the user.
3. showerror(): Display the error message to the user.
4. askquestion(): Ask question and user has to answered in yes or no.
5. askokcancel(): Confirm the user’s action regarding some application activity.
6. askyesno(): User can answer in yes or no for some action.
7. askretrycancel(): Ask the user about doing a particular task again or not.
8. Message: creates a default information box, or is same as showinfo box.

messagebox.Message(master=None, **options)
# Create a default information message box.

You can even pass your own title and message in it.

Things you can pass in the message boz:

• title: This parameter is a string which is shown as a title of a message box.
• message: This parameter is the string to be displayed as a message on the message box.
• options: There are two options that can be used are:
  1. default: This option is used to specify the default button like ABORT, RETRY, or IGNORE in the message box.
  2. parent: This option is used to specify the window on top of which the message box is to be displayed.

Links i have used for this answer:

• Message box tutorial
• Message box documentation