Added modules/libvirtvms.py but no way to unit test.

bumblebee/modules/libvirtvms.py

@@ -0,0 +1,37 @@
+
+"""Displays count of running libvirt VMs.
+
+Required the following python packages:
+	* libvirt
+        * sys
+
+"""
+import sys
+import libvirt
+import bumblebee.input
+import bumblebee.output
+import bumblebee.engine
+
+class Module(bumblebee.engine.Module):
+    def __init__(self, engine, config):
+        super(Module, self).__init__(engine, config,
+            bumblebee.output.Widget(full_text=self.status)
+        )
+        self._status = self.status
+        engine.input.register_callback(self, button=bumblebee.input.LEFT_MOUSE,
+            cmd="virt-manager")
+
+    def status(self, _):
+"""Get number of currently running libvirt VMs"""
+    conn = None
+    try:
+        conn = libvirt.openReadOnly(None)
+    except:
+        return None
+    if conn == None:
+        return None
+    return "VMs: %d" % conn.numOfDomains()
+
+    def update(self, widgets):
+	self._status = self.status
+