X-Git-Url: https://osm.etsi.org/gitweb/?a=blobdiff_plain;f=juju%2Ftag.py;h=d36316ddb552bf01fa45074c9a9d6fe1aafb7633;hb=1ad381e8757ec6647111adbff4985be257368da9;hp=f10c5efe951a7c52f8075938ea34d7c8ad04187b;hpb=6ba2856fecf224ae3fd589331e889a6587e8153b;p=osm%2FN2VC.git

diff --git a/juju/tag.py b/juju/tag.py
index f10c5ef..d36316d 100644
--- a/juju/tag.py
+++ b/juju/tag.py
@@ -1,11 +1,11 @@
 def _prefix(prefix, s):
-    if not s.startswith(prefix):
+    if s and not s.startswith(prefix):
         return '{}{}'.format(prefix, s)
     return s
 
 
 def untag(prefix, s):
-    if s.startswith(prefix):
+    if s and s.startswith(prefix):
         return s[len(prefix):]
     return s