lvl0_exercise1_banking_system

exercise_1/.gitignore

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+__pycache__

exercise_1/src/bank_account.py

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+class BankAccount:
+    def __init__(self, username, password, account_id, balance=0):
+        self._balance = balance
+        self._username = username
+        self._password = password
+        self._account_id = account_id
+
+    @property
+    def username(self):
+        """The username property (read-only)."""
+        return self._username
+
+    @property
+    def password(self):
+        """The password property (read-only)."""
+        return self._password
+
+    @property
+    def account_id(self):
+        """The account_id property (read-only)."""
+        return self._account_id
+
+    @property
+    def balance(self):
+        """The balance for the account."""
+        return self._balance
+
+    @balance.setter
+    def balance(self, amount):
+        self._balance = amount
+
+    def __str__(self):
+        """Return the details for the account."""
+        account_details = "Account details:\n"
+        account_details += f"Username: {self.username}\n"
+        account_details += f"Account number: {self.account_id}"
+        account_details += f"Balance: {self.balance}"
+        return account_details
+
+    def withdraw(self):
+        """Check if the amount is correct and makes the withdraw."""
+        print("Withdraw.\n")
+        valid_amount = False
+        while not valid_amount:
+            amount = float(input("Amount to withdraw: "))
+            if amount <= 0 or amount > self.balance:
+                print("Invalid quantity. Please try again.\n")
+            else:
+                valid_amount = True
+        self.balance -= amount
+        print(f"Withdraw success. New balance: {self.balance}.")
+
+    def show_balance(self):
+        """Prints the balance."""
+        print("Show balance.\n")
+        print(f"Your balance is: ${self.balance}")
+
+    def deposit(self):
+        """Check valid amount and deposits."""
+        print("Deposit.\n")
+        valid_amount = False
+        while not valid_amount:
+            amount = float(input("Amount: "))
+            if amount <= 0:
+                print("Invalid amount, try again.")
+            else:
+                valid_amount = True
+                self.balance += amount
+        print(f"Deposit success. New balance: ${self.balance}.")
+
+    def transference(self, other_accounts):
+        """Checks for valid account and amount. Then makes transference."""
+        print("Transference.\n")
+        valid_account = False
+        valid_amount = False
+        while not valid_account and not valid_amount:
+            destiny_account = input("Account to transfer: ")
+            amount = float(input("Amount: "))
+            amount_check = amount > 0 and amount <= self.balance
+            if destiny_account in other_accounts and amount_check:
+                print("Data verified successfuly. Making transference.")
+                valid_account = True
+                valid_amount = True
+                self.balance -= amount
+                print(f"New balance: ${self.balance}.")
+            else:
+                print("Invalid data. Please try again.")

exercise_1/src/banking_system.py

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+from bank_account import BankAccount
+
+my_account = BankAccount(
+    username="pepe", password="123", account_id="AC2323", balance=2000
+)
+
+other_accounts = ["AC3211", "AC9812", "AC2382"]
+
+
+def login():
+    """Ask up to three times the user for credentials. If success then log in
+    else the program terminates."""
+    login_tries_left = 3
+    logged_in = False
+
+    while login_tries_left > 0 and not logged_in:
+        print(f"\nYou have {login_tries_left} tries left. Be careful.")
+        username_input = input("\nUsername:\n")
+        password_input = input("\nPassword:\n")
+        if (
+            my_account.username == username_input
+            and my_account.password == password_input
+        ):
+            print(f"\nWelcome {my_account.username}!\n")
+            logged_in = True
+        else:
+            login_tries_left -= 1
+
+    if not logged_in:
+        print(
+            "You have entered your credentials wrong three times. For security reasons"
+            + " your access is blocked. gl hf contacting to support bud."
+        )
+        exit()
+
+
+def display_menu():
+    """Displays the main menu."""
+    menu_message = "Main menu:\n1. Deposit.\n"
+    menu_message += "2. Withdraw.\n"
+    menu_message += "3. View balance.\n"
+    menu_message += "4. Transference.\n"
+    menu_message += "5. Exit."
+    print(menu_message)
+
+
+def select_task(my_account):
+    """Select a task from the main menu and performs the task."""
+    selected_task = int(input("Enter a number for the task you want: "))
+
+    match selected_task:
+        case 1:
+            my_account.deposit()
+
+        case 2:
+            my_account.withdraw()
+
+        case 3:
+            my_account.show_balance()
+
+        case 4:
+            my_account.transference(other_accounts)
+
+        case 5:
+            print("Thank you for using our services. See you soon!")
+            exit()
+        case _:
+            print("Please select a valid task.")
+
+
+# Bienvenida
+print("Welcome to your favorite home-banking system")
+print("To continue please log in:")
+login()
+
+# Main Menu
+while True:
+    display_menu()
+    select_task(my_account)