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diff --git a/sandbox/sebastien/cpp/apr-2/modules/python/mod-python.hpp b/sandbox/sebastien/cpp/apr-2/modules/python/mod-python.hpp
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+/* $Rev$ $Date$ */
+
+#ifndef tuscany_modpython_hpp
+#define tuscany_modpython_hpp
+
+/**
+ * Evaluation functions used by mod-eval to evaluate Python
+ * component implementations.
+ */
+
+#include "string.hpp"
+#include "stream.hpp"
+#include "function.hpp"
+#include "list.hpp"
+#include "value.hpp"
+#include "monad.hpp"
+#include "eval.hpp"
+
+namespace tuscany {
+namespace server {
+namespace modpython {
+
+/**
+ * Apply a Python component implementation function.
+ */
+struct applyImplementation {
+    PyObject* impl;
+    const list<value> px;
+    applyImplementation(PyObject* impl, const list<value>& px) : impl(impl), px(px) {
+    }
+    const value operator()(const list<value>& params) const {
+        const value expr = append<value>(params, px);
+        debug(expr, "modeval::python::applyImplementation::input");
+        const failable<value> res = python::evalScript(expr, impl);
+        const value val = !hasContent(res)? mklist<value>(value(), reason(res)) : mklist<value>(content(res));
+        debug(val, "modeval::python::applyImplementation::result");
+        return val;
+    }
+};
+
+/**
+ * Evaluate a Python component implementation and convert it to an applicable
+ * lambda function.
+ */
+const failable<lambda<value(const list<value>&)> > evalImplementation(const string& path, const value& impl, const list<value>& px) {
+    const string spath(attributeValue("script", impl));
+    const string fpath(path + spath);
+    ifstream is(fpath);
+    if (fail(is))
+        return mkfailure<lambda<value(const list<value>&)> >(string("Could not read implementation: ") + fpath);
+    const failable<PyObject*> script = python::readScript(python::moduleName(spath), fpath, is);
+    if (!hasContent(script))
+        return mkfailure<lambda<value(const list<value>&)> >(reason(script));
+    return lambda<value(const list<value>&)>(applyImplementation(content(script), px));
+}
+
+}
+}
+}
+
+#endif /* tuscany_modpython_hpp */