Task2.py

class TaskManager:
    def _init_(self):
        self.tasks = []

    def add_task(self, task):
        self.tasks.append(task)
        print("Task added successfully.")

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

    def mark_completed(self, task_index):
        if task_index < len(self.tasks):
            self.tasks[task_index]['completed'] = True
            print("Task marked as completed.")
        else:
            print("Invalid task index.")

    def display_tasks(self):
        print("\nTasks:")
        for index, task in enumerate(self.tasks):
            print(f"{index + 1}. {task['description']} - {'Completed' if task['completed'] else 'Pending'}")


def main():
    task_manager = TaskManager()

    while True:
        print("\nTask Manager")
        print("1. Add Task")
        print("2. Delete Task")
        print("3. Mark Task as Completed")
        print("4. Display Tasks")
        print("5. Exit")

        choice = input("Enter your choice: ")

        if choice == '1':
            description = input("Enter task description: ")
            task_manager.add_task({'description': description, 'completed': False})
        elif choice == '2':
            task_index = int(input("Enter index of task to delete: ")) - 1
            task_manager.delete_task(task_index)
        elif choice == '3':
            task_index = int(input("Enter index of task to mark as completed: ")) - 1
            task_manager.mark_completed(task_index)
        elif choice == '4':
            task_manager.display_tasks()
        elif choice == '5':
            print("Exiting...")
            break
        else:
            print("Invalid choice. Please try again.")


if _name_ == "_main_":
    main()