py2 - add py3 compatible slice code for get/sets/deletes
py2 - add py3 compatible slice code for get/sets/deletes

openx/python3-protobuf,malthe/google-protobuf,openx/python3-protobuf,malthe/google-protobuf,malthe/google-protobuf,openx/python3-protobuf,openx/python3-protobuf,malthe/google-protobuf,malthe/google-protobuf,openx/python3-protobuf