Ex 14: Task Completion Tracker

Problem​

We’re building a simple task tracker for a to-do app. Whenever a user completes tasks, our app should mark them as done.

Rules​

• Define a function mark_completed_tasks(tasks: list[str]) -> list[str].
• Iterate through the list using a for loop.
• Update each task's format to: "Completed: {task}".
• Return a new list with the updated task strings.

Boilerplate​

Copy below code and paste to our IDE for head start.

# Write our code inside this function
def mark_completed_tasks(tasks: list[str]) -> list[str]:
    pass # remove this

# Call with test data
print(mark_completed_tasks(["Laundry", "Buy groceries", "Study Python"]))

Expected Output​

['Completed: Laundry', 'Completed: Buy groceries', 'Completed: Study Python']

Solution​

Only view the solution after trying our best.

def mark_completed_tasks(tasks: list[str]) -> list[str]:
    completed_tasks: list[str] = []
    for task in tasks:
        completed_tasks.append(f"Completed: {task}")

    return completed_tasks

# Test call
print(mark_completed_tasks(["Laundry", "Buy groceries", "Study Python"]))