do not depend on types.StringTypes anymore

[sfa.git] / sfa / trust / credential.py

diff --git a/sfa/trust/credential.py b/sfa/trust/credential.py
index 37af67b..f03e135 100644 (file)
--- a/sfa/trust/credential.py
+++ b/sfa/trust/credential.py
@@ -30,12 +30,13 @@ from __future__ import print_function
 
 import os, os.path
 import subprocess
-from types import StringTypes
 import datetime
 from StringIO import StringIO
 from tempfile import mkstemp
 from xml.dom.minidom import Document, parseString
 
+from sfa.util.py23 import StringType
+
 HAVELXML = False
 try:
     from lxml import etree
@@ -285,7 +286,7 @@ class Credential(object):
         self.version = None
 
         if cred:
-            if isinstance(cred, StringTypes):
+            if isinstance(cred, StringType):
                 string = cred
                 self.type = Credential.SFA_CREDENTIAL_TYPE
                 self.version = '3'
@@ -301,7 +302,7 @@ class Credential(object):
                 str = file(filename).read()
                 
             # if this is a legacy credential, write error and bail out
-            if isinstance (str, StringTypes) and str.strip().startswith("-----"):
+            if isinstance (str, StringType) and str.strip().startswith("-----"):
                 logger.error("Legacy credentials not supported any more - giving up with %s..."%str[:10])
                 return
             else: