answer:Here's the updated code with additional error handling: ```python class UserAccount: def __init__(self, name, balance=0): if not isinstance(name, str) or not name.strip(): raise ValueError(Account name must be a non-empty string.) if not isinstance(balance, (int, float)) or balance < 0: raise ValueError(Initial balance must be a non-negative number.) self.name = name self.balance = balance def deposit(self, amount): try: amount = float(amount) except ValueError: print(Invalid deposit amount. Please enter a number.) return if amount <= 0: print(Invalid deposit amount. Please enter a positive number.) else: self.balance += amount print(fDeposit successful. New balance: {self.balance}) def withdraw(self, amount): try: amount = float(amount) except ValueError: print(Invalid withdrawal amount. Please enter a number.) return if amount <= 0: print(Invalid withdrawal amount. Please enter a positive number.) elif amount > self.balance: print(Insufficient balance.) else: self.balance -= amount print(fWithdrawal successful. New balance: {self.balance}) def transfer(self, amount, recipient_account): if recipient_account == self: print(Cannot transfer money to the same account.) return try: amount = float(amount) except ValueError: print(Invalid transfer amount. Please enter a number.) return if amount <= 0: print(Invalid transfer amount. Please enter a positive number.) elif amount > self.balance: print(Insufficient balance.) else: self.balance -= amount recipient_account.balance += amount print(fTransfer successful. New balance: {self.balance}) class Bank: def __init__(self): self.accounts = {} def create_account(self, name, initial_balance=0): try: account = UserAccount(name, initial_balance) self.accounts[name] = account print(fAccount created for {name}) except ValueError as e: print(e) def get_account(self, name): return self.accounts.get(name) # Example usage: bank = Bank() bank.create_account(John Doe, 1000) bank.create_account(Jane Doe, 500) john_account = bank.get_account(John Doe) jane_account = bank.get_account(Jane Doe) john_account.deposit(500) john_account.withdraw(200) john_account.transfer(300, jane_account) # Additional error handling tests: bank.create_account(, 1000) # empty account name bank.create_account(Test, -100) # negative initial balance john_account.deposit(abc) # non-numeric deposit amount john_account.withdraw(abc) # non-numeric withdrawal amount john_account.transfer(abc, jane_account) # non-numeric transfer amount john_account.transfer(100, john_account) # transferring to the same account ``` In this updated code, I have added the following additional error handling: * In the `UserAccount` class's `__init__` method, I have added checks to ensure that the account name is a non-empty string and the initial balance is a non-negative number. * In the `deposit`, `withdraw`, and `transfer` methods, I have added `try-except` blocks to catch `ValueError` exceptions that occur when the user tries to enter a non-numeric amount. * In the `transfer` method, I have added a check to prevent users from transferring money to themselves. * In the `Bank` class's `create_account` method, I have added a `try-except` block to catch `ValueError` exceptions raised by the `UserAccount` class's `__init__` method.

answer:Here's the updated code with a menu-driven system: ```python class UserAccount: def __init__(self, name, balance=0): if not isinstance(name, str) or not name.strip(): raise ValueError(Account name must be a non-empty string.) if not isinstance(balance, (int, float)) or balance < 0: raise ValueError(Initial balance must be a non-negative number.) self.name = name self.balance = balance def deposit(self, amount): try: amount = float(amount) except ValueError: print(Invalid deposit amount. Please enter a number.) return if amount <= 0: print(Invalid deposit amount. Please enter a positive number.) else: self.balance += amount print(fDeposit successful. New balance: {self.balance}) def withdraw(self, amount): try: amount = float(amount) except ValueError: print(Invalid withdrawal amount. Please enter a number.) return if amount <= 0: print(Invalid withdrawal amount. Please enter a positive number.) elif amount > self.balance: print(Insufficient balance.) else: self.balance -= amount print(fWithdrawal successful. New balance: {self.balance}) def transfer(self, amount, recipient_account): if recipient_account == self: print(Cannot transfer money to the same account.) return try: amount = float(amount) except ValueError: print(Invalid transfer amount. Please enter a number.) return if amount <= 0: print(Invalid transfer amount. Please enter a positive number.) elif amount > self.balance: print(Insufficient balance.) else: self.balance -= amount recipient_account.balance += amount print(fTransfer successful. New balance: {self.balance}) class Bank: def __init__(self): self.accounts = {} def create_account(self, name, initial_balance=0): try: account = UserAccount(name, initial_balance) self.accounts[name] = account print(fAccount created for {name}) except ValueError as e: print(e) def get_account(self, name): return self.accounts.get(name) def main(): bank = Bank() while True: print(nBanking Application Menu:) print(1. Create Account) print(2. Deposit Money) print(3. Withdraw Money) print(4. Transfer Funds) print(5. Check Balance) print(6. Exit) choice = input(Enter your choice: ) if choice == 1: name = input(Enter account name: ) initial_balance = input(Enter initial balance (default=0): ) if initial_balance.strip(): bank.create_account(name, float(initial_balance)) else: bank.create_account(name) elif choice == 2: name = input(Enter account name: ) account = bank.get_account(name) if account: amount = input(Enter deposit amount: ) account.deposit(amount) else: print(Account not found.) elif choice == 3: name = input(Enter account name: ) account = bank.get_account(name) if account: amount = input(Enter withdrawal amount: ) account.withdraw(amount) else: print(Account not found.) elif choice == 4: sender_name = input(Enter sender's account name: ) sender_account = bank.get_account(sender_name) if sender_account: recipient_name = input(Enter recipient's account name: ) recipient_account = bank.get_account(recipient_name) if recipient_account: amount = input(Enter transfer amount: ) sender_account.transfer(amount, recipient_account) else: print(Recipient's account not found.) else: print(Sender's account not found.) elif choice == 5: name = input(Enter account name: ) account = bank.get_account(name) if account: print(fAccount balance: {account.balance}) else: print(Account not found.) elif choice == 6: print(Exiting the application. Goodbye!) break else: print(Invalid choice. Please try again.) if __name__ == __main__: main() ``` This menu-driven system allows users to perform the following operations: 1. Create a new account with an optional initial balance. 2. Deposit money into an existing account. 3. Withdraw money from an existing account. 4. Transfer funds between two existing accounts. 5. Check the balance of an existing account. 6. Exit the application. Each option is numbered, and users can enter their choice to select the desired action. The system will then prompt the user

answer:Here's a revised version of the first two paragraphs of your user manual: To set up your coffee maker, first download the coffee maker application and use it to enter your home Wi-Fi connection settings. You may need to refer to your router for this information, and you'll also need to know your network password. If you're unsure of your password, you can obtain it from your internet service provider or the person who set up your internet connection. Once you've entered your Wi-Fi settings, you can control the coffee maker remotely using the application on your Android or Apple device. This allows you to turn the coffee maker on and off, set the delay timer, and adjust other settings from anywhere. For added convenience, you can program the coffee maker to automatically turn on at a set time each morning, ensuring a fresh pot of coffee is ready for you when you wake up. The coffee maker also features a smart coffee bean usage detection system, which will notify your phone when it's time to add more beans. This system tracks the amount of beans in the machine and estimates how many cups you have left, allowing you to plan ahead and avoid running out of coffee. With this feature, you can stay on top of your coffee supply and enjoy a seamless brewing experience.

answer:Here's a revised version of the section on cleaning the device: Cleaning your coffee maker is a straightforward process that can be completed in a few simple steps. First, switch off the machine and unplug it from the electrical outlet. Next, remove any leftover coffee beans from the machine and discard them, as they can affect the quality of your next brew. Remove the water container and wash it with warm soapy water, then dry it thoroughly. To clean the exterior of the machine, use a damp cloth to wipe down the user interface and other outer parts. Be careful not to expose the machine to excessive moisture, and avoid submerging it in water. Use a dry cloth to wipe away any visible splatters or buildup on the machine, paying extra attention to areas that tend to accumulate moisture. Regular cleaning will help keep your coffee maker in good working order and ensure a great-tasting cup every time.