On Tue, Jan 22, 2013 at 9:21 AM, longeek <mengql112233(a)gmail.com&gt; wrote: Hi Meng, If openstack use it direactly, how to call these interface effectively? I think Nova should place libvirt python module to its source codes directory tree, then he can call these interfaces. Therefore, i cannot find the libvirt python module in Nova branch. Daniel said libvirt.so is from standard libvirt code itself and libvirt python module is from libvirt.so. They(libvirt.so and libvirt python module) are part of libvirt. And Nova just uses libvirt integration driver codes. But i wonder if they(libvirt integration codes and libvirt python module) have any relationships? What and how do they have? Nova's libvirt integration codes call libvirt python module, right? Where does Nova place libvirt python module? How to call libvirt python module? -- Thanks Harry Wei