How to use the podman.client.BaseClient.factory function in podman

def __init__(self,
                 uri='unix:/run/podman/io.podman',
                 interface='io.podman',
                 **kwargs):
        """Construct a podman varlink Client.

        uri from default systemd unit file.
        interface from io.podman.varlink, do not change unless
            you are a varlink guru.
        """
        self._client = BaseClient.factory(uri, interface, **kwargs)

        address = "{}-{}".format(uri, interface)
        # Quick validation of connection data provided
        try:
            if not System(self._client).ping():
                raise ConnectionRefusedError(
                    errno.ECONNREFUSED,
                    ('Failed varlink connection "{}"').format(address))
        except FileNotFoundError:
            raise ConnectionError(
                errno.ECONNREFUSED,
                ('Failed varlink connection "{}".'
                 ' Is podman socket or service running?').format(address))