Show user a message in python

If I'm correct that you want a window to let a user type in some text, then show it back as a message box, then you need two modules, tkMessageBox and Tinker, two standard modules in Python 2.7+.

The following documented code does the above

from Tkinter import *
import tkMessageBox

def getInfo():
    #This function gets the entry of the text area and shows it to the user in a message box
    tkMessageBox.showinfo("User Input", E1.get())


def quit():
    #This function closes the root window
    root.destroy()


root = Tk() #specify the root window

label1 = Label( root, text="User Input") #specify the label to show the user what the text area is about
E1 = Entry(root, bd =5) #specify the input text area

submit = Button(root, text ="Submit", command = getInfo) #specify the "submit" button that runs "getInfo" when clicked
quit_button = Button(root, text = 'Quit', command=quit) #specify the quit button that quits the main window when clicked

#Add the items we specified to the window
label1.pack()
E1.pack()
submit.pack(side =BOTTOM)
quit_button.pack(side =BOTTOM) 

root.mainloop() #Run the "loop" that shows the windows