anchor.diff:  #====================================================================================
   # libpng15 (needed by pyferret)
   
  -USER root
  -WORKDIR /opt
  -RUN wget --no-check-certificate https://sourceforge.net/projects/libpng/files/libpng15/1.5.30/libpng-1.5.30.tar.gz && \
  -    tar xvfz libpng-1.5.30.tar.gz
  -RUN cd libpng-1.5.30 && \
  -    ./configure --prefix=/usr/local/libpng && \
  -    make check && \
  -    make install
  -
  -ENV LD_LIBRARY_PATH="/usr/local/libpng/lib:${LD_LIBRARY_PATH}"
  +#USER root
  +#WORKDIR /opt
  +#RUN wget --no-check-certificate https://sourceforge.net/projects/libpng/files/libpng15/1.5.30/libpng-1.5.30.tar.gz && \
  +#    tar xvfz libpng-1.5.30.tar.gz
  +#RUN cd libpng-1.5.30 && \
  +#    ./configure --prefix=/usr/local/libpng && \
  +#    make check && \
  +#    make install
  +#
  +#ENV LD_LIBRARY_PATH="/usr/local/libpng/lib:${LD_LIBRARY_PATH}"
   
   #====================================================================================
   # pyferret installation
   
   USER root
   WORKDIR /opt
  -RUN wget https://github.com/NOAA-PMEL/PyFerret/releases/download/v7.3/pyferret-7.3-RHEL7-64.tar.gz && \
  -    tar xvfz pyferret-7.3-RHEL7-64.tar.gz
  +RUN wget https://github.com/NOAA-PMEL/PyFerret/releases/download/v7.5.0/PyFerret-7.5.0-RHEL7-64-Python2.7.tar.gz && \
  +    tar xvfz PyFerret-7.5.0-RHEL7-64-Python2.7.tar.gz
   RUN git clone https://github.com/NOAA-PMEL/FerretDatasets && \
       mv FerretDatasets fer_dsets
   
  
positive.code: #====================================================================================
  FROM python:2.7.14-stretch
  
  #====================================================================================
  LABEL maintainer="Patrick.Brockmann@lsce.ipsl.fr"
  
negative.code: RUN apt-get update && apt-get -y install libgfortran3
  RUN apt-get update && apt-get -y install r-base
  
  RUN pip install --no-cache-dir notebook==6.0.0
  RUN pip install numpy pandas bokeh
  RUN pip install randomcolor
  RUN pip install ferretmagic==20181001
  RUN pip install rpy2==3.0.5
  
  RUN pip install ipywidgets
  RUN jupyter nbextension enable --py widgetsnbextension --sys-prefix
  