anchor.diff:    cd quepy &&\
     apt-get -y install python-pip python-numpy-dbg &&\
     pip install docopt==0.6.1 &&\
  -  python setup.py install 
  +  python setup.py install &&\
     pip install quepy
   
   
  
positive.code: 
  
  RUN /etc/init.d/postgresql start &&\
    createlang plpythonu madlib &&\
    apt-get -y install ipython
  
  
  USER root
  
  
negative.code: USER postgres
  
  RUN /etc/init.d/postgresql start &&\
    psql -U postgres --command "ALTER USER postgres WITH SUPERUSER PASSWORD 'mypass';" &&\
    createdb -O postgres -U postgres madlib
  
  #psql -U postgres --command "ALTER USER postgres SET search_path = public;" &&\
  
  # EXTREMELY unsafe hack for easy DB access
  RUN sed -i 's/peer/trust/' /etc/postgresql/9.3/main/pg_hba.conf &&\
  