anchor.diff:  RUN easy_install -U pip
   RUN pip install \
     rootpy==0.7.1 \
  -  root_numpy==3.3.1
  +  root_numpy==4.1.2
   
   # XGboost
   #
  
positive.code:   && git checkout v5-34-21 \
    && ./configure --prefix=/usr/local \
    && make -j2 \
    && make install \
    && cd .. \
    && rm -rf root
  
  
negative.code: # basic python modules
  #
  RUN easy_install distribute
  # numpy goes first
  RUN pip install \
    numpy==1.9.1 
  