anchor.diff:  
   RUN apt clean
   
  -RUN pip3 install numpy
  +RUN pip install numpy
   
  -RUN pip3 install jupyterlab
  +RUN pip install jupyterlab
   
  -RUN pip3 install mayavi
  +RUN pip install mayavi
   
  -RUN pip3 install ipyevents
  +RUN pip install ipyevents
   
  -RUN pip3 install Pillow
  +RUN pip install Pillow
   
  -RUN pip3 install xvfbwrapper
  +RUN pip install xvfbwrapper
   
  -RUN pip3 install pymeshlab
  +RUN pip install pymeshlab
   
   RUN jupyter nbextension install mayavi --py --sys-prefix
   
  
positive.code:     git \
      wget \
      dumb-init
      
  RUN apt update && \
      apt install -y  --no-install-recommends \
      python3.8
      
  RUN apt update && \
      apt install -y  --no-install-recommends \
      python3-dev
  
  RUN apt update && \
      apt install -y  --no-install-recommends \
      python3-pip \
      python3-setuptools \
      python3-wheel
  
  RUN apt update && \
      apt install -y  --no-install-recommends \
  
negative.code: FROM python:3.8
  
  ARG DEBIAN_FRONTEND=noninteractive
  
  