Challenge: To-Do Manager

Lab Python Advanced 30 points

Build a small to-do manager. Read commands until the line quit:

add <task text> – add a task (the text can have spaces). Print Added: <task>
done <number> – mark task number (from 1) as done. Print Completed: <task>, or No such task if the number is wrong
list – print every task as <number>. [x] <task> if done or <number>. [ ] <task> if not, or No tasks if empty

When you read quit, print <done>/<total> tasks done.

Input

Commands, one per line, ending with quit.

Output

As described above.

Example

Input

list
add Learn loops
add Build a game
done 1
done 5
list
quit

Output

No tasks
Added: Learn loops
Added: Build a game
Completed: Learn loops
No such task
1. [x] Learn loops
2. [ ] Build a game
1/2 tasks done

Sample input available Sample output available

Editor

Python

Hints

Store each task as a dictionary: {"text": ..., "done": False}.

line.partition(" ") splits off the first word and keeps the rest of the text together.

Task numbers start at 1 but list indexes start at 0, and 0 or negative numbers are not valid tasks.

Solution explanation

This challenge combines lists, dictionaries, loops, functions and error handling – a real little application. Careful with done 0: tasks[-1] is valid Python, so we reject numbers below 1 ourselves.

Show solution

tasks = []


def show():
    if not tasks:
        print("No tasks")
    for i, task in enumerate(tasks, start=1):
        mark = "x" if task["done"] else " "
        print(f"{i}. [{mark}] {task['text']}")


while True:
    line = input()
    if line == "quit":
        break
    command, _, rest = line.partition(" ")
    if command == "add":
        tasks.append({"text": rest, "done": False})
        print("Added:", rest)
    elif command == "done":
        try:
            task = tasks[int(rest) - 1]
            if int(rest) < 1:
                raise IndexError
        except (ValueError, IndexError):
            print("No such task")
        else:
            task["done"] = True
            print("Completed:", task["text"])
    elif command == "list":
        show()

finished = sum(1 for task in tasks if task["done"])
print(f"{finished}/{len(tasks)} tasks done")

Output

Answer