Write a Python GUI program to accept a string and a character from user and count the occurrences of a character in a string.

Slip 30 Q 1

CODE :

from tkinter import *

from tkinter import messagebox

def clearAll() :

    str1Field.delete(0, END)

    char1Field.delete(0, END)

    resultField.delete(0, END)

   

def checkError() :

    if (str1Field.get() == "" or char1Field.get() == "") :

        messagebox.showerror("Input Error")

        clearAll()

        return -1

def occurrences() :

    value = checkError()

    if value == -1 :

        return

    else :

        String0 = (str1Field.get())

        char0 = (char1Field.get())

       

        i=0

        count=0

        while(i<len(String0)):

            if(String0[i]==char0):

                count=count+1

            i=i+1

       

        resultField.insert(10, str(count))

       

if __name__ == "__main__" :

    gui = Tk()

    gui.configure(background = "light green")

    gui.title("occurrences of a character in a string")

    gui.geometry("525x260")

 

 

 

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

    char = Label(gui, text = "given character", bg = "#00ffff")

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

    char1 = Label(gui, text = "character", bg = "light green")

   

    occurrenceslabel = Label(gui, text = "occurrences \n character",

    bg = "light green")

   

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

    bg = "gray", command = occurrences)

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

    bg = "Red", command = clearAll)

    str1Field = Entry(gui)

    char1Field = Entry(gui)

    resultField = Entry(gui)

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

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

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

   

   

char.grid(row = 0, column = 4)

char1.grid(row = 1, column = 3)

char1Field.grid(row = 1, column = 4)

   

result.grid(row = 4, column = 2)

occurrenceslabel.grid(row = 5, column = 2)

resultField.grid(row = 6, column = 2)

clearAllEntry.grid(row = 12, column = 2)

gui.mainloop()

OUTPUT: