Pyenv in docker

gistfile1.txt

FROM ubuntu:16.04
MAINTAINER Morten Bjoernsvik <morten_bjoernsvik@yahoo.no>

ARG LANG=nb_NO.UTF-8
ENV LANG ${LANG}
ARG TZ=Europe/Oslo
ENV TZ ${TZ}
ARG MYHOME=/root
ENV MYHOME ${MYHOME}
ARG PYTHONVER=3.7.1
ENV PYTHONVER ${PYTHONVER}
ARG PYTHONNAME=pythontest
ENV PYTHONNAME ${PYTHONNAME}
# Add perforce
RUN echo "deb http://package.perforce.com/apt/ubuntu/ xenial release" > /etc/apt/sources.list.d/perforce.list && \
    wget -qO - https://package.perforce.com/perforce.pubkey | apt-key add -
RUN apt-get update && apt-get upgrade -y && apt-get install -y locales wget git curl zip vim apt-transport-https tzdata language-pack-nb language-pack-nb-base manpages \
    build-essential libjpeg-dev libssl-dev zlib1g-dev libbz2-dev libreadline-dev libreadline6-dev libsqlite3-dev tk-dev libffi-dev libpng-dev libfreetype6-dev helix-cli
RUN echo "nb_NO.UTF-8 UTF-8" > /etc/locale.gen && \
    echo "en_US.UTF-8 UTF-8" >> /etc/locale.gen && \
    locale-gen && \
    update-locale LANG=nb_NO.UTF-8 && \
    echo "LANG=nb_NO.UTF-8" > /etc/default/locale && \
    echo "LC_ALL=nb_NO.UTF-8" >> /etc/default/locale
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone

RUN git clone https://github.com/pyenv/pyenv.git ${MYHOME}/.pyenv && \
    git clone https://github.com/yyuu/pyenv-virtualenv.git ${MYHOME}/.pyenv/plugins/pyenv-virtualenv && \
    git clone git://github.com/pyenv/pyenv-update.git ${MYHOME}/.pyenv/plugins/pyenv-update

SHELL ["/bin/bash", "-c", "-l"]

COPY ./.bash_profile  /tmp/
RUN cat /tmp/.bash_profile >> ${MYHOME}/.bashrc && \
    cat /tmp/.bash_profile >> ${MYHOME}/.bash_profile && \
    rm -f /tmp/.bash_profile && \
    source ${MYHOME}/.bash_profile && \
    pyenv install ${PYTHONVER} && \
    pyenv virtualenv ${PYTHONVER} ${PYTHONNAME} && \
    pyenv global ${PYTHONNAME}

#build
This is configured for my usecase with perforce and norwegian localization but can easily be fixed

docker build -- -t python-base:3.7.1 --build-arg PYTHONVER=3.7.1 --build-arg PYTHONNAME=<your description> .

If you use this as base for your projects and use SHELL ["/bin/bash", "-c", "-l"] it will use this python version:

$ docker run -ti python-base:3.7.1 /bin/bash
(pythontest) root@bbc55db81645:/# python --version
Python 3.7.1