def moira_user_emails(member_list):
    """
    Transform a list of moira list members to emails.
    Assumes kerberos id => <kerberos_id>@mit.edu

    Args:
        member_list (list of str): List of members returned by Moira

    Returns:
        list of str: Member emails in list
    """
    return list(
        map(
            lambda member: member if "@" in member else f"{member}@mit.edu",
            filter(None, member_list),
        )
    )