Answer
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Work Step by Step
# 12.22 (Flip coins) Write a program that displays heads (H) or tails (T) for each of nine
# coins, as shown in Figure 12.31c–d. When a cell is clicked, the coin is flipped.
# Write a custom cell class that extends Label. In the initializer of the class, bind
# the event with the method for flipping the coin. When the program
# starts, all cells initially display H.
from tkinter import * # Import tkinter
class CoinLabel(Label):
def __init__(self, container, text):
Label.__init__(self, container,
text=text, font="Helvetica 30 bold")
self.bind("", self.flip)
def flip(self, event):
if self["text"] == "H":
self["text"] = "T"
else:
self["text"] = "H"
class MainClass:
def __init__(self):
window = Tk() # Create a window
window.title("Flip Coin") # Set title
frame = Frame(window)
frame.pack()
for i in range(3):
for j in range(3):
CoinLabel(frame, text="H").grid(row=i, column=j)
window.mainloop() # Create an event loop
MainClass()
