libvirt.py 文件源码

def _get_connection(self):
        if self._cached_conn is None:
            libvirt_module = importutils.try_import('libvirt')
            if not libvirt_module:
                raise error.OSFError('libvirt-python is required '
                                     'to use LibvirtDriver')
            self._cached_conn = libvirt_module.open(self.connection_uri)

        return self._cached_conn