Docker Ubuntu 18.04 image with Python 3.7

Dockerfile

FROM ubuntu:18.04

# There is no official Ubuntu-18-based image for Python in Вocker Hub.
# But using Ubuntu 18 as a base (for everything that can't run in Alpine) is a requirement from SEC team.
# So we compile Python into Ubuntu-18 image ourselves

ENV PYTHON_VERSION 3.7.7
ENV PYTHON_PIP_VERSION 20.1
ENV DEBIAN_FRONTEND=noninteractive

# Ensure that the 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

## Install Python
RUN set -ex && apt-get -qqy update \
    # The dependencies that are required for Python build and run are taken from https://github.com/docker-library/python/blob/master/3.7/buster/slim/Dockerfile
    && apt-get -qqy install --no-install-recommends autoconf automake make unzip bzip2 dpkg-dev file gcc g++ libbz2-dev libc-dev \
    libc6-dev libcurl4-openssl-dev libdb-dev libevent-dev libgdbm-dev libglib2.0-dev libgmp-dev libkrb5-dev liblzma-dev \
    libmaxminddb-dev libncurses5-dev libncursesw5-dev libffi-dev libreadline-dev libsqlite3-dev libssl-dev libtool libwebp-dev \
    libxml2-dev libxslt-dev libyaml-dev patch tk-dev uuid-dev xz-utils zlib1g-dev ca-certificates gnupg libexpat-dev curl \
    && curl -sL "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz" --output python.tar.xz \
 && curl -sL "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz.asc" --output python.tar.xz.asc \
 && export GNUPGHOME="$(mktemp -d)" \
 && gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys "0D96DF4D4110E5C43FBFB17F2D347EA6AA65421D" \
 && gpg --batch --verify python.tar.xz.asc python.tar.xz \
 && { command -v gpgconf > /dev/null && gpgconf --kill all || :; } \
 && rm -rf "$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-loadable-sqlite-extensions --enable-optimizations --enable-option-checking=fatal \
             --enable-shared --with-system-expat --with-system-ffi --without-ensurepip \
 && make -j "$(nproc)" \
  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 '{}' + \
 && cd /usr/local/bin && ln -s idle3 idle && ln -s pydoc3 pydoc && ln -s python3 python && ln -s python3-config python-config \
 && rm -rf /usr/src/python && apt --purge -qqy remove autoconf automake make unzip gnupg && apt-get -qqy autoremove
## End install Python

## Install pip
RUN set -ex; curl -sL "https://github.com/pypa/get-pip/raw/1fe530e9e3d800be94e04f6428460fc4fb94f5a9/get-pip.py" --output get-pip.py; \
 python get-pip.py --disable-pip-version-check --no-cache-dir "pip==$PYTHON_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
## End install pip

RUN python --version
RUN pip --version

CMD ["python3"]

This allows you to set any version of Python as it is compiled from the code. This also does not depend on the Ubuntu Python packages and their strange dependencies and even more strange installation layout.

This is more fat (385Mb) than the official Python debian-slim image and more fat than if installing Python via apt package though :)

Ran into this error when running above.

#0 162.2 done.
#0 162.3 + curl -sL https://www.python.org/ftp/python/3.7.7/Python-3.7.7.tar.xz --output python.tar.xz
#0 167.1 + curl -sL https://www.python.org/ftp/python/3.7.7/Python-3.7.7.tar.xz.asc --output python.tar.xz.asc
#0 167.5 + mktemp -d
#0 167.5 + export GNUPGHOME=/tmp/tmp.OdWy89t8Bi
#0 167.5 + gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys 0D96DF4D4110E5C43FBFB17F2D347EA6AA65421D
#0 167.5 gpg: keybox '/tmp/tmp.OdWy89t8Bi/pubring.kbx' created
#0 177.8 gpg: keyserver receive failed: Server indicated a failure
------
ERROR: failed to solve: executor failed running [/bin/sh -c set -ex && apt-get -qqy update     && apt-get -qqy install --no-install-recommends autoconf automake make unzip bzip2 dpkg-dev file gcc g++ libbz2-dev libc-dev     libc6-dev libcurl4-openssl-dev libdb-dev libevent-dev libgdbm-dev libglib2.0-dev libgmp-dev libkrb5-dev liblzma-dev     libmaxminddb-dev libncurses5-dev libncursesw5-dev libffi-dev libreadline-dev libsqlite3-dev libssl-dev libtool libwebp-dev     libxml2-dev libxslt-dev libyaml-dev patch tk-dev uuid-dev xz-utils zlib1g-dev ca-certificates gnupg libexpat-dev curl     && curl -sL "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz" --output python.tar.xz  && curl -sL "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz.asc" --output python.tar.xz.asc  && export GNUPGHOME="$(mktemp -d)"  && gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys "0D96DF4D4110E5C43FBFB17F2D347EA6AA65421D"  && gpg --batch --verify python.tar.xz.asc python.tar.xz  && { command -v gpgconf > /dev/null && gpgconf --kill all || :; }  && rm -rf "$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-loadable-sqlite-extensions --enable-optimizations --enable-option-checking=fatal              --enable-shared --with-system-expat --with-system-ffi --without-ensurepip  && make -j "$(nproc)"   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 '{}' +  && cd /usr/local/bin && ln -s idle3 idle && ln -s pydoc3 pydoc && ln -s python3 python && ln -s python3-config python-config  && rm -rf /usr/src/python && apt --purge -qqy remove autoconf automake make unzip gnupg && apt-get -qqy autoremove]: 

exit code: 2