100 Days Of Python - Day 15

Day 15

Setting up a local development environment

• Installing Python on Ubuntu 22.04 using the terminal

sudo apt update
sudo apt-get install python3 python3-dev

Source: How to Install Python 3.9 on Ubuntu 20.04

• Installing Pycharm on Ubuntu 22.04 using the terminal

sudo snap install pycharm-community --classic

Source: Install PyCharm on Ubuntu using the Snap Store

Coffee Machine

Instructions

Congratulations, you’ve got a job at Python Loves Coffee, a new coffee shop that’s just opened up in town! Because Python loves coffee, you have to write a program that will work out the total cost of an order for coffee.

Example Input

What would you like? (espresso/latte/cappuccino): latte

How many shots? (1 or 2): 2

Would you like a shot of hazelnut? (y/n): y

Would you like a shot of vanilla? (y/n): n

How many sugars? (0, 1, 2, 3, 4): 2

Example Output

That will be $2.50 please.

Hint

1. Think about what coffee types and extras you have and how much they cost.
2. Check the data type of the different inputs you receive. If you want to use the test code below, you can print(type(variable_name)) to see the type of variable you’re working with.
3. The test code contains pass. This is a keyword that does nothing at all. It’s just a placeholder for where you might want to add some code in the future.
4. If you want to use the test code, remember to indent all of your code after if __name__ == "__main__":

Test Code

if __name__ == "__main__":


    def test(coffee_type, shots, hazelnut, vanilla, sugar, expected):
        print(f"Testing {coffee_type} with {shots} shots, hazelnut={hazelnut}, vanilla={vanilla}, {sugar} sugars.")
        actual = coffee_machine(coffee_type, shots, hazelnut, vanilla, sugar)
        if actual == expected:
            print("Pass")
        else:
            print(f"Fail! Expected {expected}, but got {actual}")
        print()


    # Parameters: coffee_type, shots, hazelnut, vanilla, sugar
    test("espresso", 1, False, False, 0, 1.50)
    test("latte", 2, True, False, 2, 3.50)
    test("cappuccino", 1, False, True, 1, 3.00)

Solution

MENU = {
    "espresso": {
        "ingredients": {
            "water": 50,
            "coffee": 18,
        },
        "cost": 1.5,
    },
    "latte": {
        "ingredients": {
            "water": 200,
            "milk": 150,
            "coffee": 24,
        },
        "cost": 2.5,
    },
    "cappuccino": {
        "ingredients": {
            "water": 250,
            "milk": 100,
            "coffee": 24,
        },
        "cost": 3.0,
    }
}

profit = 0
resources = {
    "water": 300,
    "milk": 200,
    "coffee": 100,
}


def is_resource_sufficient(order_ingredients):
    """Returns True when order can be made, False if ingredients are insufficient."""
    for item in order_ingredients:
        if order_ingredients[item] > resources[item]:
            print(f"​Sorry there is not enough {item}.")
            return False
    return True


def process_coins():
    """Returns the total calculated from coins inserted."""
    print("Please insert coins.")
    total = int(input("how many quarters?: ")) * 0.25
    total += int(input("how many dimes?: ")) * 0.1
    total += int(input("how many nickles?: ")) * 0.05
    total += int(input("how many pennies?: ")) * 0.01
    return total


def is_transaction_successful(money_received, drink_cost):
    """Return True when the payment is accepted, or False if money is insufficient."""
    if money_received >= drink_cost:
        change = round(money_received - drink_cost, 2)
        print(f"Here is ${change} in change.")
        global profit
        profit += drink_cost
        return True
    else:
        print("Sorry that's not enough money. Money refunded.")
        return False


def make_coffee(drink_name, order_ingredients):
    """Deduct the required ingredients from the resources."""
    for item in order_ingredients:
        resources[item] -= order_ingredients[item]
    print(f"Here is your {drink_name} ☕️. Enjoy!")


is_on = True

while is_on:
    choice = input("​What would you like? (espresso/latte/cappuccino): ")
    if choice == "off":
        is_on = False
    elif choice == "report":
        print(f"Water: {resources['water']}ml")
        print(f"Milk: {resources['milk']}ml")
        print(f"Coffee: {resources['coffee']}g")
        print(f"Money: ${profit}")
    else:
        drink = MENU[choice]
        if is_resource_sufficient(drink["ingredients"]):
            payment = process_coins()
            if is_transaction_successful(payment, drink["cost"]):
                make_coffee(choice, drink["ingredients"])