Improve silent uuid lookup function

pvcf.py

@@ -12,18 +12,22 @@ import os, sys, libvirt, uuid
 # 2. Disables stdout to avoid stupid printouts
 # 3. Try's it and returns a sensible value if not
 def lookupByUUID(tuuid):
+    conn = None
     dom = None
+    libvirt_name = "qemu:///system"
 
     # Convert the text UUID to bytes
     buuid = uuid.UUID(tuuid).bytes
 
-    # Disable stdout
+    # Flush and disable stdout and stderr
+    sys.stdout.flush()
+    sys.stderr.flush()
     sys.stdout = open(os.devnull, 'w')
+    sys.stderr = open(os.devnull, 'w')
 
     # Try
     try:
         # Open a libvirt connection
-        libvirt_name = "qemu:///system"
         conn = libvirt.open(libvirt_name)
         if conn == None:
             print('>>> %s - Failed to open local libvirt connection.' % self.domuuid)
@@ -32,16 +36,21 @@ def lookupByUUID(tuuid):
         # Lookup the UUID
         dom = conn.lookupByUUID(buuid)
 
-        # Close the libvirt connection
-        conn.close()
     # Fail
     except:
+        pass
+
+    # After everything
+    finally:
         # Close the libvirt connection
         if conn != None:
             conn.close()
 
-    # Enable stdout
+    # Flush and enable stdout and stderr
+    sys.stdout.flush()
+    sys.stderr.flush()
     sys.stdout = sys.__stdout__
+    sys.stderr = sys.__stderr__
 
     # Return the dom object (or None)
     return dom