anchor.diff:  # https://github.com/docker-library/python/issues/147
   ENV PYTHONIOENCODING UTF-8
   
  -# runtime dependencies
  -RUN apt-get update && apt-get install -y --no-install-recommends \
  -		ca-certificates \
  -		netbase \
  -	&& rm -rf /var/lib/apt/lists/*
  +# install ca-certificates so that HTTPS works consistently
  +# the other runtime dependencies for Python are installed later
  +RUN apk add --no-cache ca-certificates
   
   ENV GPG_KEY C01E1CAD5EA2C4F0B8E3571504C367C218ADD4FF
   ENV PYTHON_VERSION 2.7.15
   
   RUN set -ex \
  -	\
  -	&& savedAptMark="$(apt-mark showmanual)" \
  -	&& apt-get update && apt-get install -y --no-install-recommends \
  -		dpkg-dev \
  -		gcc \
  -		libbz2-dev \
  -		libc6-dev \
  -		libdb-dev \
  -		libgdbm-dev \
  -		libncursesw5-dev \
  -		libreadline-dev \
  -		libsqlite3-dev \
  -		libssl-dev \
  -		make \
  -		tk-dev \
  -		wget \
  -		xz-utils \
  -		zlib1g-dev \
  -# as of Stretch, "gpg" is no longer included by default
  -		$(command -v gpg > /dev/null || echo 'gnupg dirmngr') \
  -	&& rm -rf /var/lib/apt/lists/* \
  +	&& apk add --no-cache --virtual .fetch-deps \
  +		gnupg \
  +		libressl \
  +		tar \
  +		xz \
   	\
   	&& wget -O python.tar.xz "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz" \
   	&& wget -O python.tar.xz.asc "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz.asc" \
  
positive.code: 		--enable-shared \
  		--enable-unicode=ucs4 \
  	&& make -j "$(nproc)" \
  	&& make install \
  	&& ldconfig \
  	\
  	&& apt-mark auto '.*' > /dev/null \
  	&& apt-mark manual $savedAptMark \
  	&& find /usr/local -type f -executable -not \( -name '*tkinter*' \) -exec ldd '{}' ';' \
  		| awk '/=>/ { print $(NF-1) }' \
  		| sort -u \
  		| xargs -r dpkg-query --search \
  		| cut -d: -f1 \
  		| sort -u \
  		| xargs -r apt-mark manual \
  	&& apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false \
  	\
  	&& find /usr/local -depth \
  		\( \
  
negative.code: FROM openjdk:8-alpine3.7
  
  LABEL maintainer="Fu Cheng <alexcheng1982@gmail.com>"
  
  