[Level 0] - 3 exercise in Python

,gitignore

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+requirements.txt

.vscode/launch.json

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+{
+    // Use IntelliSense para saber los atributos posibles.
+    // Mantenga el puntero para ver las descripciones de los existentes atributos.
+    // Para más información, visite: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Depurador de Python: Archivo actual",
+            "type": "debugpy",
+            "request": "launch",
+            "program": "${file}",
+            "console": "integratedTerminal"
+        }
+    ]
+}

LEVEL_0/convert_bills.py

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+#2. Create a currency converter between CLP, ARS, USD, EUR, TRY, GBP with the following features:
+#The user must choose their initial currency and the currency they want to exchange to.
+#The user can choose whether or not to withdraw their funds. If they choose not to withdraw, it should return to the main menu.
+#If the user decides to withdraw the funds, the system will charge a 1% commission.
+#The system should ask the user if they want to perform another operation. If they choose to do so, it should restart the process; otherwise, the system should close.
+#Set a minimum and maximum amount for each currency, it can be of your choice.
+
+
+def apply_commision(amount):
+    return amount * 0.99
+def main():
+    while True:
+        print("\nWelcome to the currency converter, Please choice between these currency")
+        print("1. CLP")
+        print("2. ARS")
+        print("3. USD")
+        print("4. EUR")
+        print("5. TRY")
+        print("6. GBP")
+
+        while True:
+            initial_currency = int(input("Select initial currency: "))
+            exchange_currency = int(input("Select currency you want to exchange to: "))
+            if initial_currency == exchange_currency:
+                print('initial and exchange currency has not to be the same, please make again')
+            else:
+                break
+
+        amount = float(input("What is the amount you want to exchange: "))
+
+        if amount > 10000 or amount< 200:
+            print('the amount is out of the limit to make the operation')
+            continue
+
+        print("\nWhat do you want to do next?")
+        print("1. Withdraw")
+        print("2. Go to main menu")
+
+        choice = int(input("Enter your choice: "))
+
+        #feature for withdraw
+        if choice == 1 :
+            amount = apply_commision(amount)
+            print(f'the new amount is: {amount}')
+
+            yes_or_not = input("Do you want to make another operation? (Y/n): ")
+
+            if yes_or_not == 'n':
+                break
+
+
+
+if __name__ == "__main__":
+    main()

LEVEL_0/online_banking_system.py

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+#1. Create an online banking system with the following features:
+
+#* Users must be able to log in with a username and password.
+#* If the user enters the wrong credentials three times, the system must lock them out.
+#* The initial balance in the bank account is $2000.
+#* The system must allow users to deposit, withdraw, view, and transfer money.
+#* The system must display a menu for users to perform transactions.
+from passlib.context import CryptContext
+
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+
+class Account():
+    """A class to represent a bank account for an online banking system.
+
+    Attributes:
+        username (str): The account username.
+        password (str): The hashed password for the account.
+        balance (int): The account balance. Initialized to $2000.
+        login_attempts (int): The number of unsuccessful login attempts.
+        locked (bool): Status indicating whether the account is locked.
+    """
+
+    def __init__(self, username, password) -> None:
+
+        """Initialize a new account with a username and password."""
+
+        self.username = username
+        self.set_security_password(password)
+        #self.hashed = False
+        self.balance = 2000
+        self.login_attempts = 0
+        self.locked = False
+
+    def set_security_password(self, password) -> None:
+
+        """Hash the provided password and store it."""
+
+        self.password = pwd_context.hash(password)
+
+    def verify_password(self, password) -> bool:
+
+        """Verify the provided password against the stored hash.
+
+        Locks the account after 3 unsuccessful attempts.
+
+        Returns:
+            bool: True if the password is correct, False otherwise.
+        """
+
+        if self.locked:
+            print("Account is locked")
+            return False
+
+        if pwd_context.verify(password, self.password):
+            self.login_attempts = 0
+            return True
+
+        else:
+            self.login_attempts += 1
+            if self.login_attempts >= 3:
+                self.locked = True
+                print("Failed 3 times or more, Account Locked")
+                return False 
+
+        return pwd_context.verify(password, self.password)
+
+    #In this features, i have to managed balance or amount = 0
+    def deposit(self,deposit) -> None:
+
+        """Increase the account balance by the deposit amount."""
+
+        self.balance += deposit
+        print("Your deposit was sucesfully")
+
+    def withdraw(self,withdraw) -> None:
+
+        """Decrease the account balance by the withdrawal amount."""
+
+        self.balance -= withdraw
+        print("Amount retired")
+
+    def view(self) -> None:
+
+        """Print the current account balance."""
+
+        print(f"Your balance is ${self.balance}")
+
+    def transfer(self, account, amount):
+
+        """Transfer amount to another account.
+
+        Decreases the sender's balance and increases the recipient's balance.
+        """
+
+        self.balance -= amount
+        account.balance += amount
+        print("The Transfer was succesfully")
+
+def verify_account():
+    while True:
+        username = input("Username: ")
+        password = input("Password: ")
+
+        if username in accounts:
+
+            user_account = accounts[username]
+
+            if user_account.locked:
+                print("Account is locked due to multiple failed login attempts.")
+                return None
+
+            if accounts[username].verify_password(password):
+                #current_account = accounts[username]
+                print("Login Succesfull")
+                return user_account
+
+            else:
+                print("Wrong Password, please try again")
+                if user_account.locked:
+                    print("Your account has been locked")
+                    return None
+                continue
+        else:
+            accounts[username] = Account(username, password)
+            #current_account = accounts[username]
+            print("Account created")
+            return accounts[username]
+
+
+accounts = {} # Store accounts (maybe a little db)
+
+def main():
+
+
+    current_account = None
+
+    while True:
+        print("\nWelcome to the Online Banking System")
+        print("1. Login / Create Account")
+        print("2. Deposit Money")
+        print("3. Withdraw Money")
+        print("4. View Balance")
+        print("5. Transfer Money")
+        print("6. Exit")
+        choice = input("Select an option: ")
+
+        if choice == '1':
+            current_account = verify_account()
+            if current_account is None:
+                print("Exiting the system because locked account")
+                break
+
+        elif choice == '2':
+            if current_account:
+                amount = float(input("Please enter amount to deposit: "))
+                current_account.deposit(amount)
+            else:
+                print("Please be logged")
+        elif choice == '3':
+            if current_account:
+                amount = float(input("Please enter amount to withdraw: "))
+                current_account.withdraw(amount)
+            else:
+                print("Please be logged")
+        elif choice == '4':
+            if current_account:
+                #amount = float(input("Please enter amount to withdraw: "))
+                current_account.view()
+            else:
+                print("Please be logged")
+        elif choice == '5':
+            if current_account:
+                amount = float(input("Please enter amount to transfer: "))
+                second_account = input("Please enter the account to transfer: ")
+                if second_account in accounts:
+                    current_account.transfer(accounts[second_account], amount)
+                else:
+                    print("Not account Found")
+            else:
+                print("Please be logged")
+
+        elif choice == '6':
+            print("Exit")
+            break
+
+        else:
+            print("Invalid option, try again.")
+
+    #Testing if password is correctly hashed
+    #print(accounts)
+    #print(accounts[username].username)
+    #print(accounts[username].password)
+
+if __name__ == "__main__":
+    main()
+
+# Note: This script requires a specific version of bcrypt library (e.g., bcrypt==4.0.1)
+# due to compatibility issues with newer versions. Ensure to install the correct version
+# with `pip install bcrypt==4.0.1`.