Initial Python3 support

Notable Changes:
  -Convert all str types to byte types at cython layer (ascii encoding)
  -Use six for packages that have different names in Python2/Python3
  -By default, unit tests are compiled/run in Python2.7 and Python3.4
  -Ensure MACOSX_BUILD_TARGET is at least 10.7

1 files changed, 13 insertions, 0 deletions

diff --git a/src/python/grpcio/grpc/_common.py b/src/python/grpcio/grpc/_common.py
index a3fb66cd07..b8688a0149 100644
--- a/src/python/grpcio/grpc/_common.py
+++ b/src/python/grpcio/grpc/_common.py
@@ -97,3 +97,16 @@ def serialize(message, serializer):
 def deserialize(serialized_message, deserializer):
   return _transform(serialized_message, deserializer,
                     'Exception deserializing message!')
+
+
+def _encode(s):
+  if isinstance(s, bytes):
+    return s
+  else:
+    return s.encode('ascii')
+
+
+def fully_qualified_method(group, method):
+  group = _encode(group)
+  method = _encode(method)
+  return b'/' + group + b'/' + method