Slip 30 - A) Write a Python GUI program to accept a string and a character from user and count the occurrences of a character in a string.

Solution:

from tkinter import *

def volumesphere():

    count = 0

    for i in range(len(string.get())):

        if(string.get()[i] == char.get()):

            count = count + 1

            label_text.set(count)

window = Tk()

label_text=StringVar();

Label(window, text="Enter String:").grid(row=0)

Label(window, text="Enter your charcter:").grid(row=1)

Label(window, text="The total Number of Times has Occurred = ").grid(row=3)

result=Label(window, text="", textvariable=label_text).grid(row=3,column=1)

string = Entry(window)

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

char = Entry(window)

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

b = Button(window, text="Calculate", command=volumesphere)

b.grid(row=0, column=2,columnspan=2, rowspan=2, padx=5, pady=5)

mainloop()

Output: