in urn_to_sliver_id(), convert all values to string before calling str.join()

diff --git a/sfa/util/xrn.py b/sfa/util/xrn.py
index 4709b49..3dc87b6 100644 (file)
--- a/sfa/util/xrn.py
+++ b/sfa/util/xrn.py
@@ -33,7 +33,7 @@ def hrn_to_urn(hrn,type): return Xrn(hrn, type=type).urn
 def hrn_authfor_hrn(parenthrn, hrn): return Xrn.hrn_is_auth_for_hrn(parenthrn, hrn)
 
 def urn_to_sliver_id(urn, slice_id, node_id, index=0):
-    return ":".join([urn, slice_id, node_id, index])
+    return ":".join(map(str, [urn, slice_id, node_id, index]))
 
 class Xrn: