anchor.diff:      # Pandas data reader
       pip install pandas-datareader && \
       pip install wordsegment && \
  -    pip install pyahocorasick && \
       pip install wordbatch && \
       pip install emoji && \
       # Add Japanese morphological analysis engine
       pip install janome && \
       pip install wfdb && \
       pip install vecstack && \
  -    # Doesn't support Python 3.7 yet. Last release on pypi is from 2017.
  -    # Add back once this PR is released: https://github.com/scikit-learn-contrib/lightning/pull/133
  -    # pip install sklearn-contrib-lightning && \
       # yellowbrick machine learning visualization library
       pip install yellowbrick && \
       pip install mlcrate && \
       /tmp/clean-layer.sh
   
  -RUN pip install bcolz && \
  -    pip install bleach && \
  +RUN pip install bleach && \
       pip install certifi && \
       pip install cycler && \
       pip install decorator && \
  
positive.code:     /tmp/clean-layer.sh
  
  RUN pip install mpld3 && \
      pip install mplleaflet && \
      pip install gpxpy && \
      pip install arrow && \
      pip install nilearn && \
  
negative.code: 
  # The anaconda base image includes outdated versions of these packages. Update them to include the latest version.
  RUN pip install seaborn python-dateutil dask && \
      pip install pyyaml joblib husl geopy ml_metrics mne pyshp && \
      pip install pandas && \
      # Install h2o from source.
      # Use `conda install -c h2oai h2o` once Python 3.7 version is released to conda.
  