+#
+# This Dockerfile is from:
+## https://raw.githubusercontent.com/docker-library/python/aab9eaf66f960332ab6e19c0d81e0b6e6fa90a3b/2.7/buster/Dockerfile
+
+FROM buildpack-deps:buster
+
+# ensure local python is preferred over distribution python
+ENV PATH /usr/local/bin:$PATH
+
+# http://bugs.python.org/issue19846
+# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
+ENV LANG C.UTF-8
+# https://github.com/docker-library/python/issues/147
+ENV PYTHONIOENCODING UTF-8
+
+# extra dependencies (over what buildpack-deps already includes)
+RUN apt-get update && apt-get install -y --no-install-recommends \
+ tk-dev \
+ && rm -rf /var/lib/apt/lists/*
+
+ENV GPG_KEY C01E1CAD5EA2C4F0B8E3571504C367C218ADD4FF
+ENV PYTHON_VERSION 2.7.17
+
+RUN set -ex \
+ \
+ && wget -O python.tar.xz "https://www.python.org/ftp/python/${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-$PYTHON_VERSION.tar.xz.asc" \
+ && export GNUPGHOME="$(mktemp -d)" \
+ && gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys "$GPG_KEY" \
+ && gpg --batch --verify python.tar.xz.asc python.tar.xz \
+ && { command -v gpgconf > /dev/null && gpgconf --kill all || :; } \
+ && rm -rf "$GNUPGHOME" python.tar.xz.asc \
+ && mkdir -p /usr/src/python \
+ && tar -xJC /usr/src/python --strip-components=1 -f python.tar.xz \
+ && rm python.tar.xz \
+ \
+ && cd /usr/src/python \
+ && gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
+ && ./configure \
+ --build="$gnuArch" \
+ --enable-optimizations \
+ --enable-option-checking=fatal \
+ --enable-shared \
+ --enable-unicode=ucs4 \
+ && make -j "$(nproc)" \
+# setting PROFILE_TASK makes "--enable-optimizations" reasonable: https://bugs.python.org/issue36044 / https://github.com/docker-library/python/issues/160#issuecomment-509426916
+ PROFILE_TASK='-m test.regrtest --pgo \
+ test_array \
+ test_base64 \
+ test_binascii \
+ test_binhex \
+ test_binop \
+ test_bytes \
+ test_c_locale_coercion \
+ test_class \
+ test_cmath \
+ test_codecs \
+ test_compile \
+ test_complex \
+ test_csv \
+ test_decimal \
+ test_dict \
+ test_float \
+ test_fstring \
+ test_hashlib \
+ test_io \
+ test_iter \
+ test_json \
+ test_long \
+ test_math \
+ test_memoryview \
+ test_pickle \
+ test_re \
+ test_set \
+ test_slice \
+ test_struct \
+ test_threading \
+ test_time \
+ test_traceback \
+ test_unicode \
+ ' \
+ && make install \
+ && ldconfig \
+ \
+ && find /usr/local -depth \
+ \( \
+ \( -type d -a \( -name test -o -name tests -o -name idle_test \) \) \
+ -o \
+ \( -type f -a \( -name '*.pyc' -o -name '*.pyo' \) \) \
+ \) -exec rm -rf '{}' + \
+ && rm -rf /usr/src/python \
+ \
+ && python2 --version
+
+# if this is called "PIP_VERSION", pip explodes with "ValueError: invalid truth value '<VERSION>'"
+ENV PYTHON_PIP_VERSION 20.0.2
+# https://github.com/pypa/get-pip
+ENV PYTHON_GET_PIP_URL https://github.com/pypa/get-pip/raw/d59197a3c169cef378a22428a3fa99d33e080a5d/get-pip.py
+ENV PYTHON_GET_PIP_SHA256 421ac1d44c0cf9730a088e337867d974b91bdce4ea2636099275071878cc189e
+
+RUN set -ex; \
+ \
+ wget -O get-pip.py "$PYTHON_GET_PIP_URL"; \
+ echo "$PYTHON_GET_PIP_SHA256 *get-pip.py" | sha256sum --check --strict -; \
+ \
+ python get-pip.py \
+ --disable-pip-version-check \
+ --no-cache-dir \
+ "pip==$PYTHON_PIP_VERSION" \
+ ; \
+ pip --version; \
+ \
+ find /usr/local -depth \
+ \( \
+ \( -type d -a \( -name test -o -name tests -o -name idle_test \) \) \
+ -o \
+ \( -type f -a \( -name '*.pyc' -o -name '*.pyo' \) \) \
+ \) -exec rm -rf '{}' +; \
+ rm -f get-pip.py
+
+# install "virtualenv", since the vast majority of users of this image will want it
+RUN pip install --no-cache-dir virtualenv
+
+CMD ["python2"]
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