car_manager.py

from turtle import Turtle
import random


## Resources
# Code is from and inspired by with some improvements:
# 100 Days of Code: The Complete Python Pro Bootcamp
# https://www.udemy.com/share/103J8C3@0R0_ZWb7kJ4do0X-4zRsulmwTyefJndLSF7-DCQhp_3ojIbfiWmdBIvIMOalNv_ECg==/


COLORS = ["red", "orange", "yellow", "green", "blue", "purple"]
STARTING_MOVE_DISTANCE = 5
MOVE_INCREMENT = 10


class CarManager:
    """
    A class to manage the cars in the Turtle Crossing game.

    Handles the creation, movement, and speed of the cars.

    Attributes:
        all_cars (list): A list to store all the car objects.
        car_speed (int): The current speed of the cars.

    Methods:
        create_car(): Creates a new car at a random y-position and adds 
        it to the list of cars.
        move_cars(): Moves all the cars to the left by the current car speed.
        level_up(): Increases the speed of the cars.
    """
    def __init__(self):
        self.all_cars = []
        self.car_speed = STARTING_MOVE_DISTANCE

    def create_car(self):
        random_chance = random.randint(1, 6)
        if random_chance == 1:
            new_car = Turtle("square")
            new_car.shapesize(stretch_wid=1, stretch_len=2)
            new_car.penup()
            new_car.color(random.choice(COLORS))
            random_y = random.randint(-250, 250)
            new_car.goto(300, random_y)
            self.all_cars.append(new_car)

    def move_cars(self):
        for car in self.all_cars:
            car.backward(self.car_speed)

    def level_up(self):
        self.car_speed += MOVE_INCREMENT