import socket
import sys

sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)

server_address = '/var/lib/libvirt/qemu/channel/target/domain-25-win7_32bit/com.redhat.kvm-vdi.0'
try:
    sock.connect(server_address)
except socket.error, msg:
    print >>sys.stderr, msg
    sys.exit(1)
try:
    message= '{"name":"shutdown", "parameters":[{"timeout":0, "reboot":0, "message":"shutdown"}]}'
    sock.sendall(message)

finally:
    sock.close()