Add a better __repr__ for Metadata objects in Python bindings

native_client/python/impl.i

@@ -46,6 +46,23 @@ import_array();
   }
 %}
 
+%extend struct MetadataItem {
+%pythoncode %{
+  def __repr__(self):
+    return 'MetadataItem(character=\'{}\', timestep={}, start_time={})'.format(self.character, self.timestep, self.start_time)
+%}
+}
+
+%extend struct Metadata {
+%pythoncode %{
+  def __repr__(self):
+    items_repr = ', \n'.join('  ' + repr(i) for i in self.items)
+    return 'Metadata(confidence={}, items=[\n{}\n])'.format(self.confidence, items_repr)
+%}
+}
+
+%ignore Metadata::num_items;
+
 %extend struct Metadata {
   ~Metadata() {
     DS_FreeMetadata($self);

native_client/python/setup.py

@@ -64,7 +64,7 @@ def main():
                        include_dirs=[numpy_include, '../'],
                        library_dirs=list(map(lambda x: x.strip(), lib_dirs_split(os.getenv('MODEL_LDFLAGS', '')))),
                        libraries=list(map(lambda x: x.strip(), libs_split(os.getenv('MODEL_LIBS', '')))),
-                       swig_opts=['-c++', '-keyword', '-builtin'])
+                       swig_opts=['-c++', '-keyword'])
 
     setup(name=project_name,
           description='A library for running inference on a DeepSpeech model',