Minor changes

src/oic/oauth2/__init__.py

@@ -554,7 +554,7 @@ class Client(PBase):
         elif token.is_valid():
             return token
         else:
-            raise ExpiredToken()
+            raise ExpiredToken("Token has expired")
 
     def construct_request(self, request, request_args=None, extra_args=None):
         if request_args is None:

src/oic/oauth2/message.py

@@ -117,7 +117,8 @@ class Message(object):
         if not self.lax:
             for attribute, (_, req, _ser, _, na) in _spec.items():
                 if req and attribute not in self._dict:
-                    raise MissingRequiredAttribute("%s" % attribute, self)
+                    raise MissingRequiredAttribute("%s" % attribute,
+                                                   "%s" % self)
 
         params = []
 

src/oic/utils/http_util.py

@@ -314,7 +314,10 @@ def get_or_post(environ):
     return data
 
 
-def extract_from_request(environ, kwargs={}):
+def extract_from_request(environ, kwargs=None):
+    if kwargs is None:
+        kwargs = {}
+
     request = None
     try:
         request = environ["QUERY_STRING"]

src/oic/utils/sdb.py

@@ -218,7 +218,6 @@ class SessionDB(object):
         Construct a sub (subject identifier)
 
         :param sid: Session identifier
-        :param uid: The local user identifier
         :param sector_id: Possible sector identifier
         :param preferred_id_type: 'public'/'pairwise'
         :return: