Write Python GUI program that takes input string and change letter to upper case when a button is pressed.

Slip 17 Q 1

CODE:

from tkinter import *

from tkinter import messagebox

def clearAll() :

    str1Field.delete(0, END)

    altersField.delete(0, END)

   

def checkError() :

    if (str1Field.get() == "" ) :

        messagebox.showerror("Input Error")

        clearAll()

        return -1

def upper() :

    value = checkError()

    if value == -1 :

        return

    else :

        String0 = (str1Field.get())

       

        newstr=String0.upper()

       

       

        altersField.insert(20, str(newstr))

       

if __name__ == "__main__" :

    gui = Tk()

    gui.configure(background = "light green")

    gui.title("upper case")

    gui.geometry("250x200")

   

    Stringin = Label(gui, text = " given String", bg = "#00ffff")

    str1 = Label(gui, text = "String", bg = "light green")

    str1Field = Entry(gui)

   

    result = Button(gui, text = "Result", fg = "Black",

                bg = "gray", command = upper)

   

    alters = Label(gui, text = "upper case string", bg = "light green")

    altersField = Entry(gui)

   

    clearAllEntry = Button(gui, text = "Clear All", fg = "Black",

                bg = "Red", command = clearAll)

Stringin.grid(row = 0, column = 1)

str1.grid(row = 1, column = 0)

str1Field.grid(row = 1, column = 1)

   

alters.grid(row = 2, column = 0)

altersField.grid(row = 2, column = 1)

clearAllEntry.grid(row = 3, column = 0)

result.grid(row = 3, column = 1)

gui.mainloop()

OUTPUT: