import re
from typing import List
from million.model.message import Message


def retain_counts(messages : List[Message])-> List[Message]:
    """
    Retain only the messages that have a content and a sender_name
    """
    return [
        m for m in messages 
        if m.content and 
        m.sender_name and
        re.search('(\d{2,}|^\d$)', m.content)
        ]