anchor.diff:  #====================================================================================
  -FROM python:2.7.16-buster
  +FROM python:3.6
   
   #====================================================================================
   LABEL maintainer="Patrick.Brockmann@lsce.ipsl.fr"
  
positive.code: 
  #====================================================================================
  RUN apt-get update && apt-get -y install wget git
  #RUN apt-get update && apt-get -y install libgfortran3
  RUN apt-get update && apt-get -y install r-base
  
  RUN pip install notebook
  RUN pip install numpy pandas bokeh
  
negative.code:     ${NB_USER}
  
  #====================================================================================
  # pyferret installation
  
  USER root
  WORKDIR /opt
  RUN git clone https://github.com/NOAA-PMEL/FerretDatasets && \
      mv FerretDatasets fer_dsets
  
  