Merge pull request BVLC#4227 from philkr/save_hdf5

[pycaffe] expose saving/loading nets as hdf5 to python

python/caffe/_caffe.cpp

@@ -114,6 +114,14 @@ void Net_Save(const Net<Dtype>& net, string filename) {
   WriteProtoToBinaryFile(net_param, filename.c_str());
 }
 
+void Net_SaveHDF5(const Net<Dtype>& net, string filename) {
+  net.ToHDF5(filename);
+}
+
+void Net_LoadHDF5(Net<Dtype>* net, string filename) {
+  net->CopyTrainedLayersFromHDF5(filename.c_str());
+}
+
 void Net_SetInputArrays(Net<Dtype>* net, bp::object data_obj,
     bp::object labels_obj) {
   // check that this network has an input MemoryDataLayer
@@ -267,7 +275,9 @@ BOOST_PYTHON_MODULE(_caffe) {
         bp::return_value_policy<bp::copy_const_reference>()))
     .def("_set_input_arrays", &Net_SetInputArrays,
         bp::with_custodian_and_ward<1, 2, bp::with_custodian_and_ward<1, 3> >())
-    .def("save", &Net_Save);
+    .def("save", &Net_Save)
+    .def("save_hdf5", &Net_SaveHDF5)
+    .def("load_hdf5", &Net_LoadHDF5);
   BP_REGISTER_SHARED_PTR_TO_PYTHON(Net<Dtype>);
 
   bp::class_<Blob<Dtype>, shared_ptr<Blob<Dtype> >, boost::noncopyable>(

python/caffe/test/test_net.py

@@ -79,3 +79,17 @@ def test_save_and_read(self):
             for i in range(len(self.net.params[name])):
                 self.assertEqual(abs(self.net.params[name][i].data
                     - net2.params[name][i].data).sum(), 0)
+
+    def test_save_hdf5(self):
+        f = tempfile.NamedTemporaryFile(mode='w+', delete=False)
+        f.close()
+        self.net.save_hdf5(f.name)
+        net_file = simple_net_file(self.num_output)
+        net2 = caffe.Net(net_file, caffe.TRAIN)
+        net2.load_hdf5(f.name)
+        os.remove(net_file)
+        os.remove(f.name)
+        for name in self.net.params:
+            for i in range(len(self.net.params[name])):
+                self.assertEqual(abs(self.net.params[name][i].data
+                    - net2.params[name][i].data).sum(), 0)