exception-class-with-attributes.py

class TransactionLimitExceededError(Exception):
    """Raised when a transaction exceeds the allowed limit."""

    def __init__(self, amount, limit):
        self.amount = amount
        self.limit = limit
        super().__init__(f"Transaction amount of {amount} exceeds the limit of {limit}.")


try:
    raise TransactionLimitExceededError(500, 200)
except TransactionLimitExceededError as e:
    print(f"Attempted transaction of {e.amount} exceeds the limit of {e.limit}.")

# outputs:
# Attempted transaction of 500 exceeds the limit of 200.