Build a Budget App Project - Build a Budget App Project

Python
1

Tell us what’s happening:

I can’t figure out “create_spend_chart should print a different chart representation. Check that all spacing is exact. Open your browser console with F12 for more details.”

Your code so far

class Category:
    def __init__(self, name):
        self.name = name
        self.ledger = []

    def deposit(self, amount, description=""):
        self.ledger.append({"amount": amount, "description": description})

    def withdraw(self, amount, description=""):
        if self.check_funds(amount):
            self.ledger.append({"amount": -amount, "description": description})
            return True
        return False

    def get_balance(self):
        return sum(item["amount"] for item in self.ledger)

    def transfer(self, amount, category):
        if self.check_funds(amount):
            self.withdraw(amount, f"Transfer to {category.name}")
            category.deposit(amount, f"Transfer from {self.name}")
            return True
        return False

    def check_funds(self, amount):
        return amount <= self.get_balance()

    def __str__(self):
        title = f"{self.name:*^30}\n"
        items = ""
        for entry in self.ledger:
            description = entry["description"][:23]
            amount = f"{entry['amount']:.2f}"
            items += f"{description:<23}{amount:>7}\n"
        total = f"Total: {self.get_balance():.2f}"
        return title + items + total


def create_spend_chart(categories):
    total_spent = 0
    category_spending = []

    # Calculate total spending and spending per category
    for category in categories:
        spent = sum(-item["amount"] for item in category.ledger if item["amount"] < 0)
        category_spending.append((category.name, spent))
        total_spent += spent

    # Calculate percentages without rounding, keeping them exact
    percentages = [(name, (spent / total_spent) * 100) for name, spent in category_spending]

    # Chart title
    chart = "Percentage spent by category\n"

    # Add percentage bars (ensure no extra \n or spaces after the bar lines)
    for i in range(100, -1, -10):
        chart += f"{i:>3}|"
        for _, percentage in percentages:
            chart += " o " if percentage >= i else "   "
        chart += "\n"

    # Add horizontal line
    line_length = 3 * len(categories) + 1
    chart += "    " + "-" * line_length + "\n"

    # Add category names vertically
    max_name_length = max(len(name) for name, _ in percentages)
    names = [name.ljust(max_name_length) for name, _ in percentages]

    for i in range(max_name_length):
        chart += "     "
        for name in names:
            chart += f" {name[i]} "
        if i < max_name_length - 1:  # Ensure no trailing newlines after the last row
            chart += "\n"

    return chart.rstrip()  # Remove any trailing space or newline
food = Category("Food")
food.deposit(1000, "deposit")
food.withdraw(10.15, "groceries")
food.withdraw(15.89, "restaurant and more food for dessert")
clothing = Category("Clothing")
food.transfer(50, clothing)
print(food)

print(create_spend_chart([food, clothing]))

Your browser information:

User Agent is: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Challenge Information:

Build a Budget App Project - Build a Budget App Project

2

did you do this?

The assertion error and diff gives you a lot of information to track down a problem. For example:

AssertionError: 'Year' != 'Years'
- Year
+ Years
?     +

Your output comes first, and the output that the test expects is second.

AssertionError: ‘Year’ != ‘Years’

Your output: Year does not equal what’s expected: Years

This is called a diff, and it shows you the differences between two files or blocks of code:

- Year
+ Years
?     +

- Dash indicates the incorrect output
+ Plus shows what it should be
? The Question mark line indicates the place of the character that’s different between the two lines. Here a + is placed under the missing s .

Here’s another example:

E       AssertionError: Expected different output when calling "arithmetic_arranger()" with ["3801 - 2", "123 + 49"]
E       assert '  3801      123    \n   - 2     + 49    \n------    -----    \n' == '  3801      123\n-    2    +  49\n------    -----'
E         -   3801      123
E         +   3801      123    
E         ?                ++++
E         - -    2    +  49
E         +    - 2     + 49    
E         - ------    -----
E         + ------    -----    
E         ?                +++++

The first line is long, and it helps to view it as 2 lines in fixed width characters, so you can compare it character by character:

'  3801      123    \n   - 2     + 49    \n------    -----    \n'
'  3801      123\n-    2    +  49\n------    -----'

Again, your output is first and the expected output is second. Here it’s easy to see extra spaces or \n characters.

E         -   3801      123
E         +   3801      123    
E         ?                ++++

Here the ? line indicates 4 extra spaces at the end of a line using four + symbols. Spaces are a little difficult to see this way, so it’s useful to use both formats together.

I hope this helps interpret your error!