centos6.5 kvm virt-install

Question

[hadoop@Hadoop bin]$ virt-manager
Traceback (most recent call last):
File "/usr/share/virt-manager/virt-manager.py", line 400, in
main()
File "/usr/share/virt-manager/virt-manager.py", line 251, in main
from virtManager import cli
File "/usr/share/virt-manager/virtManager/cli.py", line 29, in
import libvirt
ImportError: No module named libvirt

[root@Hadoop bin]# virt-install
Traceback (most recent call last):
File "/usr/bin/virt-install", line 31, in
import urlgrabber.progress as progress
ImportError: No module named urlgrabber.progress