How to Create a Data Helper Class in Python with OOP

class User:
    def __init__(self, name, email):
        self.name = name
        self.email = email
        self.posts = []

    def create_post(self, title, content):
        post = Post(title, content, self)
        self.posts.append(post)
        return post

    def get_post_count(self):
        return len(self.posts)

    def __repr__(self):
        return f"User(name={self.name!r}, email={self.email!r})"


class Post:
    def __init__(self, title, content, author):
        self.title = title
        self.content = content
        self.author = author

    def get_author_name(self):
        return self.author.name

    def summary(self):
        return f"{self.title} by {self.author.name}: {self.content[:30]}..."

    def __repr__(self):
        return f"Post(title={self.title!r}, author={self.author.name!r})"


class Blog:
    def __init__(self):
        self.users = []

    def add_user(self, user):
        self.users.append(user)
        return user

    def all_posts(self):
        return [post for user in self.users for post in user.posts]

    def find_user_by_email(self, email):
        for user in self.users:
            if user.email == email:
                return user
        return None


if __name__ == "__main__":
    blog = Blog()

    alice = blog.add_user(User("Alice", "alice@example.com"))
    bob = blog.add_user(User("Bob", "bob@example.com"))

    alice.create_post("Hello World", "This is my first blog post about Python.")
    alice.create_post("OOP Basics", "Classes and objects make code reusable.")
    bob.create_post("Data Helpers", "Helper classes simplify data management.")

    print("All posts:")
    for post in blog.all_posts():
        print(f"- {post.summary()}")

    found = blog.find_user_by_email("alice@example.com")
    print(f"\n{found.name} has written {found.get_post_count()} posts.")
    print(f"Bob's first post author: {blog.all_posts()[2].get_author_name()}")