type_checking.py

# ------------------------
# Q. Do not run the following code.

# This code contains bugs related to types. They are bugs mypy can catch.

# Read this code to understand what it’s trying to do. Add type annotations to the method parameters and return types of this code. Run the code through mypy, and fix all of the bugs that show up. When you’re confident all of the type annotations are correct, and the bugs are fixed, run the code and check it works.
# ------------------------

def open_account(balances: dict[str, int], name: str, amount: int):
    balances[name] = amount


def sum_balances(accounts: dict[str, int]):
    total = 0
    for name, pence in accounts.items():
        print(f"{name} had balance {pence}")
        total += pence
    return total


def format_pence_as_string(total_pence: int):
    if total_pence < 100:
        return f"{total_pence}p"
    pounds = int(total_pence / 100)
    pence = total_pence % 100
    return f"£{pounds}.{pence:02d}"


balances = {
    "Sima": 700,
    "Linn": 545,
    "Georg": 831,
}

# Added missing argument for balances
# Converted float and string arguments to integers
open_account(balances, "Tobi", 913)
open_account(balances, "Olya", 713)

total_pence = sum_balances(balances)
total_string = format_pence_as_string(total_pence)

print(f"The bank accounts total {total_string}")