In Python 2, you don't need to talk about byte strings explicitly, but by using them, you can make it very clear as to whether you're using bytes or characters.

python 3.X flatc version 1.7.1 (Sep 27 2017) Ubuntu 16.04.2 LTS flatbuffers serialization format for Python: INSTALLED: 2015.5.14.0 I would like to store a python bytearray in a flatbuffer vector of ...