add artifact builder for python
diff --git a/tools/run_tests/artifact_targets.py b/tools/run_tests/artifact_targets.py
index a34fa8e..32a98c9 100644
--- a/tools/run_tests/artifact_targets.py
+++ b/tools/run_tests/artifact_targets.py
@@ -80,6 +80,34 @@
   return {'CFLAGS': arch_arg, 'LDFLAGS': arch_arg}
 
 
+class PythonArtifact:
+  """Builds Python artifacts."""
+
+  def __init__(self, platform, arch):
+    self.name = 'python_%s_%s' % (platform, arch)
+    self.platform = platform
+    self.arch = arch
+    self.labels = ['artifact', 'python', platform, arch]
+
+  def pre_build_jobspecs(self):
+      return []
+
+  def build_jobspec(self):
+    if self.platform == 'windows':
+      raise Exception('Not supported yet.')
+    else:
+      if self.platform == 'linux':
+        return create_docker_jobspec(self.name,
+            'tools/dockerfile/grpc_artifact_linux_%s' % self.arch,
+            'tools/run_tests/build_artifact_python.sh')
+      else:
+        return create_jobspec(self.name,
+                              ['tools/run_tests/build_artifact_python.sh'])
+
+  def __str__(self):
+    return self.name
+
+
 class CSharpExtArtifact:
   """Builds C# native extension library"""
 
@@ -134,4 +162,6 @@
           CSharpExtArtifact('macos', 'x86'),
           CSharpExtArtifact('macos', 'x64'),
           CSharpExtArtifact('windows', 'x86'),
-          CSharpExtArtifact('windows', 'x64')]
+          CSharpExtArtifact('windows', 'x64'),
+          PythonArtifact('linux', 'x86'),
+          PythonArtifact('linux', 'x64')]