Add project metadata generation to Python
diff --git a/src/python/grpcio/setup.py b/src/python/grpcio/setup.py
index e408f2a..caa71a4 100644
--- a/src/python/grpcio/setup.py
+++ b/src/python/grpcio/setup.py
@@ -98,6 +98,8 @@
 
 _COMMAND_CLASS = {
     'doc': commands.SphinxDocumentation,
+    'build_project_metadata': commands.BuildProjectMetadata,
+    'build_py': commands.BuildPy,
 }
 
 setuptools.setup(