def __init__(self, primary, domains):
        """
        @param primary: The IP address of the server from which to perform
        zone transfers.
        @type primary: L{str}

        @param domains: A sequence of domain names for which to perform
        zone transfers.
        @type domains: L{list} of L{bytes}
        """
        self.primary = primary
        self.domains = [SecondaryAuthority(primary, d) for d in domains]

        @param primary: The IP address of the server from which to perform
        zone transfers.
        @type primary: L{str}

        @param domains: A sequence of domain names for which to perform
        zone transfers.
        @type domains: L{list} of L{bytes}
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/names/secondary.py