def __init__(self, mbox=b'', txt=b'', ttl=None):
        """
        @param mbox: See L{Record_RP.mbox}.
        @type mbox: L{bytes} or L{unicode}

        @param txt: See L{Record_RP.txt}
        @type txt: L{bytes} or L{unicode}
        """
        self.mbox = Name(mbox)
        self.txt = Name(txt)
        self.ttl = str2time(ttl)

        @param mbox: See L{Record_RP.mbox}.
        @type mbox: L{bytes} or L{unicode}

        @param txt: See L{Record_RP.txt}
        @type txt: L{bytes} or L{unicode}
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/names/dns.py