message: Add libsdl1.2-dev to Dockerfile for Python3, to run A3C model
diff: @@ -30,6 +30,7 @@ FROM ubuntu:16.04
  # clang-format-3.9 is needed for code-style checks
  # python3-pil is needed to run the inception-resnet-v2 model
  # python3-tk is used by matplotlib (pip installed below)
  +# libsdl1.2-dev is needed to run the A3C model
  RUN apt-get update && apt-get install -y \
  python3-pip virtualenv \
  python3-numpy python3-dev python3-wheel \
  @@ -43,7 +44,8 @@ RUN apt-get update && apt-get install -y \
  locate curl \
  clang-format-3.9 \
  python3-pil \
  - python3-tk
  + python3-tk \
  + libsdl1.2-dev
  # The "locate" command uses a prepopulated index. If this index is not built,
  # then "locate" will find absolutely nothing. In Tensorflow's configure,
  