Summary

• Learned to create a turtle racing game using Python's turtle module, with multiple turtle instances racing across the screen
• Implemented random movement using randint to generate varying step distances between 0-10 for each turtle
• Used a while loop controlled by is_race_on flag to manage race progression
• Created multiple turtle instances stored in all_turtles list, each with unique colors and positions
• Set finish line at X-coordinate 230 (accounting for turtle size), ending race when first turtle crosses
• Demonstrated object-oriented programming concepts through independent turtle instances with different states
• Implemented betting system where user predicts winning turtle color

Resources

Notes\ Code

Time to make our race and give them random movement. We also want to check when the race is won and if the user bet on the right turtle. Here’s how we accomplished this:

from turtle import Turtle, Screen
import random

is_race_on = False
screen = Screen()
screen.setup(width=500, height=400)
user_bet = screen.textinput(title="Make your bet", prompt="Which turtle will win the race? Enter a color: ")
colors = ["red", "orange", "yellow", "green", "blue", "purple"]
y_positions = [-70, -40, -10, 20, 50, 80]
all_turtles = []

for turtle_index in range(0,6):
    new_turtle = Turtle(shape="turtle")
    new_turtle.penup()
    new_turtle.color(colors[turtle_index])
    new_turtle.goto(x=-230, y=y_positions[turtle_index])
    all_turtles.append(new_turtle)

if user_bet:
    is_race_on = True

while is_race_on:
    for turtle in all_turtles:
        if turtle.xcor() > 230:
            is_race_on = False
            winning_color = turtle.pencolor()
            if winning_color == user_bet:
                print("You win!")
            else:
                print("You lose.")
            print(f"The winning turtle was {winning_color}")

        random_distance = random.randint(0,10)
        turtle.forward(random_distance)

screen.exitonclick()

To get our turtle’s to move we wanted to use a random integer from 0 to 10, and we put this in a variable that set their forward movement.

random_distance = random.randint(0,10)
        turtle.forward(random_distance)

To get all the turtles to move we wrapped this in a for loop but we also needed to modify our turtle code as they didn’t really exist in anything. To do this when we create them we, we now append them to an empty list called all_turtles.

all_turtles = []

for turtle_index in range(0,6):
    new_turtle = Turtle(shape="turtle")
    new_turtle.penup()
    new_turtle.color(colors[turtle_index])
    new_turtle.goto(x=-230, y=y_positions[turtle_index])
    all_turtles.append(new_turtle)

Now we can write our for loop for the turtles in all_turtles to move:

for turtle in all_turtles:
    random_distance = random.randint(0,10)
    turtle.forward(random_distance)