todo_list.py

class Task:
    def __init__(self, description, due_date=None, priority=None):
        self.description = description
        self.due_date = due_date
        self.priority = priority

class ToDoList:
    def __init__(self):
        self.tasks = []

    def add_task(self, task):
        self.tasks.append(task)

    def view_tasks(self):
        if not self.tasks:
            print("No tasks yet.")
        else:
            for i, task in enumerate(self.tasks, 1):
                print(f"{i}. {task.description}")
                if task.due_date:
                    print(f"   Due Date: {task.due_date}")
                if task.priority:
                    print(f"   Priority: {task.priority}")
                print()

    def delete_task(self, index):
        if 1 <= index <= len(self.tasks):
            del self.tasks[index - 1]
            print("Task deleted successfully.")
        else:
            print("Invalid task index.")

def main():
    todo_list = ToDoList()

    while True:
        print("\nTo-Do List Menu:")
        print("1. Add Task")
        print("2. View Tasks")
        print("3. Delete Task")
        print("4. Quit")

        choice = input("Enter your choice: ")

        if choice == '1':
            description = input("Enter task description: ")
            due_date = input("Enter due date (optional): ")
            priority = input("Enter priority level (optional): ")
            new_task = Task(description, due_date, priority)
            todo_list.add_task(new_task)
            print("Task added successfully.")
        elif choice == '2':
            todo_list.view_tasks()
        elif choice == '3':
            index = int(input("Enter the index of the task to delete: "))
            todo_list.delete_task(index)
        elif choice == '4':
            print("Exiting...")
            break
        else:
            print("Invalid choice. Please enter a number from 1 to 4.")

if __name__ == "__main__":
    main()