Member.py

class Member:
    """
    Represents a library member with name, phone, and email.
    """

    def __init__(self, name, phone, email):
        # Strip input and check if valid
        name = name.strip() if name else ""
        phone = phone.strip() if phone else ""
        email = email.strip() if email else ""

        # Validation of inputs
        if not name or not phone or not email:
            raise ValueError("One of the inputs is None, empty, or contains only spaces!")
        elif not all(c.isalpha() or c.isspace() for c in name):
            raise ValueError("Name must contain only letters and spaces.")
        elif not phone.isdigit() or len(phone) != 10:
            raise ValueError("Not a legal phone number.")
        elif not email.endswith("@gmail.com") or " " in email:
            raise ValueError("Not a legal email address, use gmail, with no spaces.")
        else:
            self.name = name
            self.phone = phone
            self.email = email
            self.notification = []

    def __str__(self):
        # Return member info as a string
        return f"Name: {self.name} | Phone: {self.phone} | Email: {self.email}"

    def update(self, text):
        # Add a new notification to the member
        self.notification.append(text)
        print(f"New message in '{self.name}' Notifications:   {text}\n")


class MemberIterator:
    """
    Iterator for iterating through a list of members.
    """
    def __init__(self, members):
        self._members = members
        self._index = 0

    def __iter__(self):
        # Return the iterator object itself
        return self

    def __next__(self):
        # Get the next member or raise StopIteration
        if self._index < len(self._members):
            member = self._members[self._index]
            self._index += 1
            return member
        else:
            raise StopIteration