#306: throw exception when addressing out of bounds

src/bindings/python/local-contrib.i

@@ -375,4 +375,20 @@ class AutoProperty(type):
     {
         __metaclass__ = AutoProperty
     }
-}
+}
+
+%extend IdList
+{
+    %pythoncode
+    {
+        def __len__(self):
+           return self.size()
+        
+        def __getitem__(self, index):
+            return self.at(index)
+
+        def __iter__(self):
+            for i in range(self.size()):
+                yield self.at(i)        
+    }
+}

src/bindings/swig/libsbml.i

@@ -779,6 +779,7 @@ as a comment in the output stream.
 %include sbml/common/common-documentation.h
 %include sbml/common/common-sbmlerror-codes.h
 
+%catches(std::exception, ...) IdList::at;
 %include <sbml/util/IdList.h>
 %include <sbml/util/IdentifierTransformer.h>
 %include <sbml/util/ElementFilter.h>