Answer
code
Work Step by Step
# 9.10 (Display a pie chart) Write a program that uses a pie chart to display the percentages
# of the overall grade represented by the project, quizzes, the midterm exam,
# and the final exam, as shown in Figure 9.26b. Suppose that project is weighted as
# 20 percent of the grade and is displayed in red, quizzes are 10 percent and are displayed
# in blue, the midterm exam is 30 percent and is displayed in green, and the
# final exam is 40 percent and is displayed in orange.
from tkinter import * # Import tkinter
import math
radius = 100
width = 300
height = 300
class MainGUI:
def drawAPie(self, start, extent, color, title):
self.canvas.create_arc(width / 2 - radius, height / 2 - radius,
width / 2 + radius, height / 2 + radius,
start=start, extent=extent, fill=color)
x = width / 2 + radius * math.cos(math.radians(extent / 2 + start))
y = height / 2 - radius * math.sin(math.radians(extent / 2 + start))
self.canvas.create_text(x, y, text=title)
def __init__(self):
window = Tk() # Create a window
window.title("Pie Chart") # Set a title
self.canvas = Canvas(window, bg="white", width=width, height=height)
self.canvas.pack()
self.drawAPie(0, 360 * 0.2, "red", "Project -- 20%")
self.drawAPie(360 * 0.2, 360 * 0.1, "blue", "Quizzes -- 10%")
self.drawAPie(360 * 0.2 + 360 * 0.1, 360 * 0.3, "green", "Midterm -- 30%")
self.drawAPie(360 * 0.2 + 360 * 0.1 + 360 * 0.3, 360 * 0.4, "orange", "Final -- 40%")
window.mainloop() # Create an event loop
MainGUI()
