def __init__(self, uri):
        if not have_libvirt:
            raise RuntimeError('Libvirt driver requires \'libvirt\' Python ' +
                               'package')

        self._uri = uri
        self.connection = libvirt.open(uri)
:param  uri: Hypervisor URI (e.g. vbox:///session, qemu:///system,
dataset/ETHPy150Open apache/libcloud/libcloud/compute/drivers/libvirt_driver.py/LibvirtNodeDriver.__init__