please avoid import * as far as possible

diff --git a/sfa/trust/hierarchy.py b/sfa/trust/hierarchy.py
index 0ae7e4b..0aafa5f 100644 (file)
--- a/sfa/trust/hierarchy.py
+++ b/sfa/trust/hierarchy.py
@@ -15,10 +15,10 @@
 import os
 
 from sfa.util.sfalogging import sfa_logger
+from sfa.util.namespace import get_leaf, get_authority, hrn_to_urn, urn_to_hrn
 from sfa.trust.certificate import Keypair
-from sfa.trust.credential import *
+from sfa.trust.credential import Credential
 from sfa.trust.gid import GID, create_uuid
-from sfa.util.namespace import get_leaf, get_authority, hrn_to_urn, urn_to_hrn
 from sfa.util.config import Config
 from sfa.util.sfaticket import SfaTicket