anchor.diff:          python3.7-dev \
           python3.8-dev \
           python3.9-dev \
  -        # Needed due to python3.8 apt packaging issue.
  +        # python >= 3.8 needs distutils for packaging.
           python3.8-distutils \
           python3.9-distutils \
           rename \
  
positive.code: 
  # Re-declare args because the args declared before FROM can't be used in any
  # instruction after a FROM.
  # We cannot update the TF image because it doesn't have the headers for
  # Python 3.6
  ARG cpu_base_image="tensorflow/tensorflow:2.1.0-custom-op-ubuntu16"
  ARG base_image=$cpu_base_image
  ARG tensorflow_pip="tf-nightly"
  ARG python_version="python3.6"
  
negative.code:       pandas \
        portpicker'
  
  RUN for python in ${python_version}; do \
      $python get-pip.py && \
      $python -mpip uninstall -y tensorflow tensorflow-gpu tf-nightly tf-nightly-gpu && \
  