diff --git a/openerp/osv/orm.py b/openerp/osv/orm.py
index e651552dc99..0c03c3e3f80 100644
--- a/openerp/osv/orm.py
+++ b/openerp/osv/orm.py
@@ -79,19 +79,19 @@ ROOT_USER_ID = 1
 def transfer_field_to_modifiers(field, modifiers):
     default_values = {}
     state_exceptions = {}
-    for a in ('invisible', 'readonly', 'required'):
-        default_values[a] = False
-        state_exceptions[a] = []
-        if field.get(a):
-            default_values[a] = bool(field.get(a))
-    for state, modifs in (field.get("states") or {}).items():
+    for attr in ('invisible', 'readonly', 'required'):
+        state_exceptions[attr] = []
+        default_values[attr] = bool(field.get(attr))
+    for state, modifs in (field.get("states",{})).items():
         for modif in modifs:
-            if(default_values[modif[0]] != modif[1]):
+            if default_values[modif[0]] != modif[1]:
                 state_exceptions[modif[0]].append(state)
-    
+
     for attr, default_value in default_values.items():
-        modifiers[attr] = [("state", "not in" if default_value else "in", state_exceptions[attr])] \
-                if state_exceptions[attr] else default_value
+        if state_exceptions[attr]:
+            modifiers[attr] = [("state", "not in" if default_value else "in", state_exceptions[attr])]
+        else:
+            modifiers[attr] = default_value
 
 
 # Don't deal with groups, it is done by check_group().