library management python.py

books = ["Python Basics", "Data Structures", "AI Introduction", "Machine Learning", "Operating Systems"]
borrowed = []
returned = []

while True:
    print("\n1. Show Available Books")
    print("2. Borrow Book")
    print("3. Return Book")
    print("4. Show Borrowed Books")
    print("5. Show Returned Books")
    print("6. Exit")

    choice = input("Enter choice: ")

    if choice == "1":
        if len(books) == 0:
            print("No books available")
        else:
            for b in books:
                print(b)

    elif choice == "2":
        name = input("Enter book name to borrow: ").title()
        if name in books:
            books.remove(name)
            borrowed.append(name)
            print("Book borrowed successfully")
        else:
            print("Book not available")

    elif choice == "3":
        name = input("Enter book name to return: ").title()
        if name in borrowed:
            borrowed.remove(name)
            books.append(name)
            returned.append(name)
            print("Book returned successfully")
        else:
            print("This book was not borrowed")

    elif choice == "4":
        if len(borrowed) == 0:
            print("No borrowed books")
        else:
            for b in borrowed:
                print(b)

    elif choice == "5":
        if len(returned) == 0:
            print("No returned books")
        else:
            for b in returned:
                print(b)

    elif choice == "6":
        break

    else:
        print("Invalid choice")