Parse bytes into message objects for further manipulation

parsing_messages.py

def get_raw_messages(server):
    message_ids = [
        int(message_id.split(b" ")[0]) for message_id in server.list()[1]
    ]
    raw_messages = [
         b"\n".join(server.retr(message_id)[1]) for message_id in message_ids
    ]
    return [
          parser.BytesParser().parsebytes(raw_message) for raw_message in raw_messages
    ]