[base] Special handling of base smartlist objects

Author: mpsonntag

odml/base.py

@@ -23,6 +23,10 @@ def __eq__(self, obj):
         Do a deep comparison of this object and its odml properties.
         The 'id' attribute of an object is excluded, since it is
         unique within a document.
+        SmartList attributes of 'sections' and 'properties' are
+        handled specially: We want to make sure that the lists'
+        objects are properly compared without changing the order
+        of the individual lists.
         """
         # cannot compare totally different stuff
         if not isinstance(self, obj.__class__):
@@ -31,6 +35,14 @@ def __eq__(self, obj):
         for key in self._format:
             if key == "id" or key == "oid":
                 continue
+            elif (isinstance(getattr(self, key), SmartList) and
+                  sorted(getattr(self, key), key=lambda x: x.name) !=
+                  sorted(getattr(obj, key), key=lambda x: x.name)):
+                # This special case was introduced only due to the fact
+                # that RDF files will be loaded with randomized list
+                # order. With any other file format the list order
+                # remains unchanged.
+                return False
             elif getattr(self, key) != getattr(obj, key):
                 return False