def _fromString_AGENTV3(cls, data):
        """
        Return a private key object corresponsing to the Secure Shell Key
        Agent v3 format.

        The SSH Key Agent v3 format for a RSA key is::
            string 'ssh-rsa'
            integer e
            integer d
            integer n
            integer u
            integer p
            integer q

        The SSH Key Agent v3 format for a DSA key is::
            string 'ssh-dss'
            integer p
            integer q
            integer g
            integer y
            integer x

        @type data: L{bytes}
        @param data: The key data.

        @return: A new key.
        @rtype: L{twisted.conch.ssh.keys.Key}
        @raises BadKeyError: if the key type (the first string) is unknown
        """
        keyType, data = common.getNS(data)
        if keyType == b'ssh-dss':
            p, data = common.getMP(data)
            q, data = common.getMP(data)
            g, data = common.getMP(data)
            y, data = common.getMP(data)
            x, data = common.getMP(data)
            return cls._fromDSAComponents(y=y, g=g, p=p, q=q, x=x)
        elif keyType == b'ssh-rsa':
            e, data = common.getMP(data)
            d, data = common.getMP(data)
            n, data = common.getMP(data)
            u, data = common.getMP(data)
            p, data = common.getMP(data)
            q, data = common.getMP(data)
            return cls._fromRSAComponents(n=n, e=e, d=d, p=p, q=q, u=u)
        else:
            raise BadKeyError("unknown key type %s" % (keyType,))

        Return a private key object corresponsing to the Secure Shell Key
        Agent v3 format.

        The SSH Key Agent v3 format for a RSA key is::
            string 'ssh-rsa'
            integer e
            integer d
            integer n
            integer u
            integer p
            integer q

        The SSH Key Agent v3 format for a DSA key is::
            string 'ssh-dss'
            integer p
            integer q
            integer g
            integer y
            integer x

        @type data: L{bytes}
        @param data: The key data.

        @return: A new key.
        @rtype: L{twisted.conch.ssh.keys.Key}
        @raises BadKeyError: if the key type (the first string) is unknown
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/conch/ssh/keys.py