Updating bindings throws errors on value query on Descriptors (#101)

Author: rozyczko

src/easyscience/Objects/Inferface.py

@@ -164,7 +164,12 @@ def generate_bindings(self, model, *args, ifun=None, **kwargs):
                 prop = props[idx]
 
                 # Should be fetched this way to ensure we don't get value from callback
-                prop_value = prop.value_no_call_back
+                if hasattr(prop, 'value_no_call_back'):
+                    # Property object
+                    prop_value = prop.value_no_call_back
+                else:
+                    # Descriptor object
+                    prop_value = prop.value
 
                 prop._callback = item.make_prop(item_key)
                 prop._callback.fset(prop_value)