Fixed string concatenation in case where there is no lower level error

1 files changed, 4 insertions, 1 deletions

diff --git a/libvir.py b/libvir.py
index b0f0b2c..dc4bc29 100644
--- a/libvir.py
+++ b/libvir.py
@@ -63,7 +63,10 @@ class libvirtError(Exception):
         return self.err[8]
 
     def __str__(self):
-        return Exception.__str__(self) + " " + self.get_error_message()
+        if self.get_error_message() is None:
+            return Exception.__str__(self)
+        else:
+            return Exception.__str__(self) + " " + self.get_error_message()
 
 #
 # register the libvirt global error handler