anchor.diff:  ARG HOST_UID=1000
   ENV HOST_UID $HOST_UID
   
  -RUN groupadd -g 1000 ithemal
  -RUN useradd -m -s /bin/bash -r -u $HOST_UID -g ithemal ithemal
  +RUN groupadd -g 1000 ithemal && useradd -m -s /bin/bash -r -u $HOST_UID -g ithemal ithemal
   USER ithemal
   WORKDIR /home/ithemal
   
   # non-login shell
  -RUN echo 'export PATH=/opt/conda/bin:$PATH' >> /home/ithemal/.bash_profile
  -RUN echo 'source activate ithemal' >> /home/ithemal/.bash_profile
  -RUN echo 'export PYTHONPATH="/home/ithemal/ithemal/learning/pytorch"' >> /home/ithemal/.bash_profile
  +RUN /bin/echo 'export PATH=/opt/conda/bin:$PATH' >> /home/ithemal/.bash_profile && \
  +        /bin/echo 'source activate ithemal' >> /home/ithemal/.bash_profile && \
  +        /bin/echo 'export PYTHONPATH="/home/ithemal/ithemal/learning/pytorch"' >> /home/ithemal/.bash_profile
   
   # login shell
  -RUN echo 'export PATH=/opt/conda/bin:$PATH' >> /home/ithemal/.bashrc
  -RUN echo 'source activate ithemal' >> /home/ithemal/.bashrc
  -RUN echo 'export PYTHONPATH="/home/ithemal/ithemal/learning/pytorch"' >> /home/ithemal/.bashrc
  +RUN /bin/echo 'export PATH=/opt/conda/bin:$PATH' >> /home/ithemal/.bashrc && \
  +        /bin/echo 'source activate ithemal' >> /home/ithemal/.bashrc && \
  +        /bin/echo 'export PYTHONPATH="/home/ithemal/ithemal/learning/pytorch"' >> /home/ithemal/.bashrc
   
   RUN bash -lc 'pip install --upgrade --user pyhamcrest pip; jupyter notebook --generate-config'
   
  
positive.code:         wget
  
  # install mysql
  RUN wget -O /tmp/RPM-GPG-KEY-mysql https://repo.mysql.com/RPM-GPG-KEY-mysql
  RUN apt-key add /tmp/RPM-GPG-KEY-mysql
  RUN /bin/echo -e "deb http://repo.mysql.com/apt/debian/ stretch mysql-5.7\ndeb-src http://repo.mysql.com/apt/debian/ stretch mysql-5.7" > /etc/apt/sources.list.d/mysql.list
  RUN apt-get update
  RUN DEBIAN_FRONTEND=noninteractive apt-get install -y mysql-server
  COPY docker_my.cnf /etc/my.cnf
  
  RUN wget --quiet -O /tmp/install_conda.sh https://repo.continuum.io/miniconda/Miniconda2-latest-Linux-x86_64.sh && \
  
negative.code:         rm /tmp/install_conda.sh
  
  RUN /opt/conda/bin/conda create --name ithemal python=2.7
  RUN /opt/conda/bin/conda install -q -n ithemal -c pytorch pytorch=1.1.0
  RUN /opt/conda/bin/conda install -q -n ithemal \
          cython=0.29 \
          graphviz=2.40.1 \
  