""" A test class showing how to add iterators to classes """

iter_class_test.py

class TodoList(object):
    """ A test class showing how to add iterators to classes """
    def __init__(self):
        self.tasks = []  # initialise empty list

    def __iter__(self):
        return iter(self.tasks)

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

LIST = TodoList()

for i in range(10):  # create a task list
    task = f"task {str(i+1).zfill(2)}"
    LIST.add_task(task)

for task in LIST:  # iterate over the instance object
    print(task)