Answer
code
Work Step by Step
# 10.33 (Tkinter: draw histograms) Write a program that generates 1,000 lowercase letters
# randomly, counts the occurrence of each letter, and displays a histogram for
# the occurrences, as shown in Figure 10.16a.
import random
from tkinter import *
class MainGUI:
def __init__(self):
window = Tk()
self.cnvs = Canvas(window, width=550)
self.cnvs.pack()
self.btn = Button(window, text="Display histogram",command=self.dispHist)
self.btn.pack()
window.mainloop()
def dispHist(self):
self.cnvs.delete('all')
counts = [0] * 26
for i in range(1000):
c = random.randint(0, 25)
counts[c] += 1
self.cnvs.create_line(0, 300, 550, 300)
x = 0
for i in range(26):
c = chr(i + ord('a'))
self.cnvs.create_text(x + 20, 305, text=c)
x += 20
height = counts[i]*200/max(counts)
self.cnvs.create_rectangle(x - 10, 300, x + 10, height)
MainGUI()
