--- a/src/memory/memory.py	Sat Sep 07 02:03:17 2013 +0200
+++ b/src/memory/memory.py	Sun Sep 08 15:00:15 2013 +0200
@@ -33,7 +33,7 @@
 
 SAVEFILE_PARAM_XML = "/param"  # xml parameters template
 SAVEFILE_DATABASE = "/sat.db"
-
+NO_SECURITY_LIMIT = -1
 
 class Params(object):
     """This class manage parameters with xml"""
@@ -377,9 +377,9 @@
     def __constructProfileXml(self, security_limit, profile):
         """Construct xml for asked profile, filling values when needed
         /!\ as noticed in doc, don't forget to unlink the minidom.Document
-        @security_limit: -1 to return all the params. Otherwise sole the
-        params which have a security level defined *and* lower or equal to
-        the specified value are returned.
+        @security_limit: NO_SECURITY_LIMIT (-1) to return all the params.
+        Otherwise sole the params which have a security level defined *and*
+        lower or equal to the specified value are returned.
         @param profile: profile name (not key !)
         @return: a deferred that fire a minidom.Document of the profile xml (cf warning above)
         """
@@ -545,7 +545,7 @@
                 categories.append(cat.getAttribute("name"))
         return categories
 
-    def setParam(self, name, value, category, security_limit=-1, profile_key='@NONE@'):
+    def setParam(self, name, value, category, security_limit=NO_SECURITY_LIMIT, profile_key='@NONE@'):
         """Set a parameter, return None if the parameter is not in param xml"""
         #TODO: use different behaviour depending of the data type (e.g. password encrypted)
         if profile_key != "@NONE@":
@@ -920,19 +920,19 @@
     def asyncGetStringParamA(self, name, category, attr="value", profile_key='@NONE@'):
         return self.params.asyncGetStringParamA(name, category, attr, profile_key)
 
-    def getParamsUI(self, security_limit, profile_key):
+    def getParamsUI(self, security_limit=NO_SECURITY_LIMIT, profile_key='@NONE@'):
         return self.params.getParamsUI(security_limit, profile_key)
 
-    def getParams(self, security_limit, profile_key):
+    def getParams(self, security_limit=NO_SECURITY_LIMIT, profile_key='@NONE@'):
         return self.params.getParams(security_limit, profile_key)
 
-    def getParamsForCategory(self, category, security_limit, profile_key):
+    def getParamsForCategory(self, category, security_limit=NO_SECURITY_LIMIT, profile_key='@NONE@'):
         return self.params.getParamsForCategory(category, security_limit, profile_key)
 
     def getParamsCategories(self):
         return self.params.getParamsCategories()
 
-    def setParam(self, name, value, category, security_limit, profile_key):
+    def setParam(self, name, value, category, security_limit=NO_SECURITY_LIMIT, profile_key='@NONE@'):
         return self.params.setParam(name, value, category, security_limit, profile_key)
 
     def importParams(self, xml):