Project: To-Do List

Our final mini-project: a to-do list manager. We'll build functions to add, remove, mark as done, and display tasks. This ties together everything: lists, dictionaries, functions, loops, if/else, and string formatting

Each task is a dictionary with a name and a done status

task = {"name": "Learn Python", "done": False}

Our to-do list is a list of these dictionaries

todos = [
    {"name": "Learn Python", "done": True},
    {"name": "Build a project", "done": False},
    {"name": "Get a job at CyberStars", "done": False}
]

Let's build the functions one by one

Adding a task

def add_task(todos, name):
    todos.append({"name": name, "done": False})

Marking a task as done (by index)

def complete_task(todos, index):
    if 0 <= index < len(todos):
        todos[index]["done"] = True

Removing a task (by index)

def remove_task(todos, index):
    if 0 <= index < len(todos):
        todos.pop(index)

.pop(index) removes the element at that position from the list

Displaying all tasks

def display_todos(todos):
    for i, task in enumerate(todos):
        status = "done" if task["done"] else "not done"
        print(f"{i}. [{status}] {task['name']}")

Putting it all together

todos = []

add_task(todos, "Finish Python curriculum")
add_task(todos, "Start Java curriculum")
add_task(todos, "Touch grass")

display_todos(todos)
print("---")

complete_task(todos, 0)
display_todos(todos)
print("---")

remove_task(todos, 2)
display_todos(todos)

Output

0. [not done] Finish Python curriculum
1. [not done] Start Java curriculum
2. [not done] Touch grass
---
0. [done] Finish Python curriculum
1. [not done] Start Java curriculum
2. [not done] Touch grass
---
0. [done] Finish Python curriculum
1. [not done] Start Java curriculum

Each function does one thing and does it well. This is a core principle of good programming. The functions are small, easy to understand, and easy to test

A count function is useful too

def count_done(todos):
    count = 0
    for task in todos:
        if task["done"]:
            count += 1
    return count

def count_not_done(todos):
    return len(todos) - count_done(todos)

Mission: Mission Task Board

The crew tracks its work on a shared task board. You'll read the tasks from input, build the board, mark some as complete, then print it. Each task is a dictionary with a name and a done status, and the board is a list of those dictionaries.

Write three functions:

add_task(tasks, name): append a new task to the list with done set to False.
complete_task(tasks, index): mark the task at that index as done.
count_done(tasks): return how many tasks are done.

Then:

Read a number N, then read N task names (one per line) and add each one to the board.
Read one more line of indices to complete, separated by spaces (for example 0 2), and mark each of those tasks as done.
Display the board: for each task print its index, then . , then [done] or [pending], then the task name.
Finally print Completed: followed by the number done, a /, and the total.

Input:

3
Run diagnostics
Refuel reactor
Chart course
0 2

Output

0. [done] Run diagnostics
1. [pending] Refuel reactor
2. [done] Chart course
Completed: 2/3