def main():
# Create a graphics window called 'Palindrome Tester' and save it to
# variable 'win'
win = GraphWin("Palindrome Tester", 400, 400)
# Create and draw text to instruct the user to type their word/phrase
Text(Point(100, 30), "Type your word or phrase in here:").draw(win)
# Create and draw an Entry box that receives user input in the
# variable 'test'
test = Entry(Point(195, 60), 50)
test.draw(win)
# Create three buttons to test, retry, and quit the program
testbutton = Button(win, Point(200, 140), 80, 50, "Test")
retrybutton = Button(win, Point(200, 230), 80, 50, "Try Another")
quitbutton = Button(win, Point(200, 320), 80, 50, "Quit")
# Activate the quit button always
quitbutton.activate()
# Create a variable 'testfailed' that keeps track of how many failed tests
testfailed = 0
# Create text to display whether it is or is not a palindrome
result = Text(Point(200, 90), "")
result.draw(win)
# Activate the test button
testbutton.activate()
# Continue while the number of failed attempts is less than or equal
# to 3
while testfailed <= 3:
# Expect a mouse click in variable 'pt'
pt = win.getMouse()
# If the test button is both active/clicked and not failed
if testbutton.activeandclicked(pt) and testfailed < 3:
# Get the user's input in the Entry box AFTER the click
testval = test.getText()
# If the user input is empty
if testval == "":
# Close the window
win.close()
# Re-run the program
main()
else:
# Deactivate the test button
testbutton.deactivate()
# Remove all spaces and punctuation marks using the string
# method replace, and replace with an empty string
testval = testval.replace(" ", "")
testval = testval.replace("!", "")
testval = testval.replace("@", "")
testval = testval.replace("#", "")
testval = testval.replace("$", "")
testval = testval.replace("%", "")
testval = testval.replace("^", "")
testval = testval.replace("&", "")
testval = testval.replace("*", "")
testval = testval.replace("(", "")
testval = testval.replace(")", "")
testval = testval.replace("-", "")
testval = testval.replace("_", "")
testval = testval.replace("=", "")
testval = testval.replace("+", "")
testval = testval.replace(";", "")
testval = testval.replace(":", "")
testval = testval.replace("/", "")
testval = testval.replace("?", "")
testval = testval.replace(".", "")
testval = testval.replace(">", "")
testval = testval.replace(",", "")
testval = testval.replace("<", "")
testval = testval.replace("|", "")
testval = testval.replace("]", "")
testval = testval.replace("[", "")
testval = testval.replace("}", "")
testval = testval.replace("{", "")
testval = testval.replace("'", "")
# Use one quotes around the double quote
testval = testval.replace('"', '')
# Make each character lowercase
testval = testval.lower()
# Initialize the total number of characters as 0 in 'numofch'
numofch = 0
# Use a for loop to go through each character and add to
# character count 'numofch'
for ch in testval:
numofch += 1
# Check if the number of characters is an even number by
# checking if its remainder when dividing by 2 is 0
if numofch % 2 == 0:
# Find the first half of the string by indexing from the
# beginning until half the string length
firsthalf = testval[:(len(testval) // 2)]
# Find the second half of the string by indexing from
# half the string length until the end
secondhalf = testval[(len(testval) // 2):]
# Create an empty list 'reversedlistsecondhalf'
reversedlistsecondhalf = []
# Set the number of characters to the length of the
# second half
numofch2 = len(secondhalf)
# Keep looping while the number of characters is greater
# than 0
while numofch2 > 0:
# Add the characters of 'secondhalf' backwards to
# the list 'reversedlistsecondhalf'
reversedlistsecondhalf += secondhalf[numofch2 - 1]
# Every time reduce the number of characters
# remaining so the loop stops when there are no
# characters left
numofch2 = numofch2 - 1
# Create an empty string 'reversedstrsecondhalf'
reversedstrsecondhalf = ""
# For each item in the list 'reversedlistsecondhalf'
for i in reversedlistsecondhalf:
# Add each to the string so it's now a string
reversedstrsecondhalf += i
# If the first half is the same as the second half
# reversed
if firsthalf == reversedstrsecondhalf:
# Change the text to let the user know it was a
# successful palindrome
result.setText("This IS a palindrome!")
# Reset the 'testfailed' counter to 0
testfailed = 0
# Activate the try again button
retrybutton.activate()
# If the first half is not the same as the second half
# reversed
else:
# Change the text to let the user know it was not
# a successful palindrome
result.setText("This is NOT a palindrome. Try again.")
# Add 1 to the 'testfailed' counter
testfailed += 1
# Activate the try again button
retrybutton.activate()
# Check if the number of characters is an odd number by
# checking if its remainder when dividing by 2 is not 0
else:
# Find the first half of the string by indexing from the
# beginning until half the string length
firsthalf = testval[:(len(testval) // 2)]
# Find the second half of the string by indexing from
# half the string length until the end
secondhalf = testval[(len(testval) // 2) + 1:]
# Create an empty list 'reversedlistsecondhalf'
reversedlistsecondhalf = []
# Set the number of characters to the length of the
# second half
numofch2 = len(secondhalf)
# Keep looping while the number of characters is greater
# than 0
while numofch2 > 0:
# Add the characters of 'secondhalf' backwards to
# the list 'reversedlistsecondhalf'
reversedlistsecondhalf += secondhalf[numofch2 - 1]
# Every time reduce the number of characters
# remaining so the loop stops when there are no
# characters left
numofch2 = numofch2 - 1
# Create an empty string 'reversedstrsecondhalf'
reversedstrsecondhalf = ""
# For each item in the list 'reversedlistsecondhalf'
for i in reversedlistsecondhalf:
# Add each to the string so it's now a string
reversedstrsecondhalf += i
# If the first half is the same as the second half
# reversed
if firsthalf == reversedstrsecondhalf:
# Change the text to let the user know it was a
# successful palindrome
result.setText("This IS a palindrome!")
# Reset the 'testfailed' counter to 0
testfailed = 0
# Activate the try again button
retrybutton.activate()
# If the first half is not the same as the second half
# reversed
else:
# Change the text to let the user know it was not
# a successful palindrome
result.setText("This is NOT a palindrome. Try again.")
# Add 1 to the 'testfailed' counter
testfailed += 1
# Activate the try again button
retrybutton.activate()
# If the try again button is both active and clicked
if retrybutton.activeandclicked(pt):
# Deactivate the try again button
retrybutton.deactivate()
# Change the result text to an empty string
result.setText("")
# Change the entry box text to an empty string
test.setText("")
# Activate the test button
testbutton.activate()
# If the user fails three times in a row, close the window
if testfailed == 3:
# Deactivate the try again button
retrybutton.deactivate()
# Deactivate the test button
testbutton.deactivate()
# Change the result text to let the user know they need to quit
result.setText("3 failed attempts. Click 'Quit' to Quit.")
# If at any time the quit button is clicked, close the window
if quitbutton.clicked(pt):
win.close()
