Generate a :class:`Keypair` object via a strkey encoded public key.

        :param str address: A base32 encoded public key encoded as described in
            :func:`encode_check`
        :return: A new :class:`Keypair` with only a verifying (public) key.

def from_address(cls, address):
        """Generate a :class:`Keypair` object via a strkey encoded public key.

        :param str address: A base32 encoded public key encoded as described in
            :func:`encode_check`
        :return: A new :class:`Keypair` with only a verifying (public) key.

        """
        public_key = is_valid_address(address)
        verifying_key = ed25519.VerifyingKey(public_key)
        return cls(verifying_key)