w3cschool@w3cschool:~$ mdkir -p ~/python ~/python/myapp

FROM buildpack-deps:jessie

# remove several traces of debian python

RUN apt-get purge -y python.*

# 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

# gpg: key F73C700D: public key "Larry Hastings <larry@hastings.org>" imported

ENV GPG_KEY 97FC712E4C024BBEA48A61ED3A5CA953F73C700D

ENV PYTHON_VERSION 3.5.1

# if this is called "PIP_VERSION", pip explodes with "ValueError: invalid truth value '<VERSION>'"

ENV PYTHON_PIP_VERSION 8.1.2

RUN set -ex \

   && curl -fSL "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz.asc" -o python.tar.xz.asc \

   && export GNUPGHOME="$(mktemp -d)" \

   && gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$GPG_KEY" \

   && gpg --batch --verify python.tar.xz.asc python.tar.xz \

   && rm -r "$GNUPGHOME" python.tar.xz.a   sc \

   && 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 \

   && ./configure --enable-shared --enable-unicode=ucs4 \

   && make -j$(nproc) \

   && make install \

   && ldconfig \

   && pip3 install --no-cache-dir --upgrade --ignore-installed pip==$PYTHON_PIP_VERSION \

   && find /usr/local -depth \

            \( \

            \( -type d -a -name test -o -name tests

            \) \

            -o \

            \( -type f -a -name '*.pyc' -o -name '*.pyo'

            \) \

            \) -exec rm -rf '{}' +

   && rm -rf /usr/src/python ~/.cache

# make some useful symlinks that are expected to exist

RUN cd /usr/local/bin \

   && ln -s easy_install-3.5 easy_install \

   && ln -s idle3 idle \

   && ln -s pydoc3 pydoc \

   && ln -s python3 python \

   && ln -s python3-config python-config

CMD ["python3"]

w3cschool@w3cschool:~/python$ docker build -t python:3.5 .

w3cschool@w3cschool:~/python$ docker images python:3.5

REPOSITORY TAG IMAGE ID CREATED SIZE

python 3.5 045767ddf24a 9 days ago 684.1 MB

w3cschool@w3cschool:~/python$ docker pull python:3.5

#!/usr/bin/python

print("Hello, World!");

w3cschool@w3cschool:~/python$ docker run -v $PWD/myapp:/usr/src/myapp -w /usr/src/myapp python:3.5 python helloworld.py

Hello World!