Docker Install Python
Method#1: docker pull python:3.5
Find the Python image on Docker Hub:
You can view other versions of python by Sort by, which defaults to the latest version python:latest.
In addition, we can also use the docker search python command to see the available versions:
apidemos@apidemos:~/python$ docker search python
NAME DESCRIPTION STARS OFFICIAL AUTOMATED
python Python is an interpreted,... 982 [OK]
kaggle/python Docker image for Python... 33 [OK]
azukiapp/python Docker image to run Python ... 3 [OK]
vimagick/python mini python 2 [OK]
tsuru/python Image for the Python ... 2 [OK]
pandada8/alpine-python An alpine based python image 1 [OK]
1science/python Python Docker images based on ... 1 [OK]
lucidfrontier45/python-uwsgi Python with uWSGI 1 [OK]
orbweb/python Python image 1 [OK]
pathwar/python Python template for Pathwar levels 1 [OK]
rounds/10m-python Python, setuptools and pip. 0 [OK]
ruimashita/python ubuntu 14.04 python 0 [OK]
tnanba/python Python on CentOS-7 image. 0 [OK]
Here we pull the official image, labeled as 3.5:
apidemos@apidemos:~/python$ docker pull python:3.5
Once the download is complete, we can check the local mirror list for the REPOSITORY for python, labeled 3.5:
apidemos@apidemos:~/python$ docker images python:3.5
REPOSITORY TAG IMAGE ID CREATED SIZE
python 3.5 045767ddf24a 9 days ago 684.1 MB
Method#2: Build via Dockerfile
Create Dockerfile
First, create the directory python to store the relevant stuff later.
apidemos@apidemos:~$ mkdir -p ~/python ~/python/myapp
The myapp directory will be mapped to the python container configuration application directory.
Go to the created python directory and create a Dockerfile.
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" -o python.tar.xz \
&& 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.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 \
&& ./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"]
Create an image via Dockerfile, replacing it with your own name:.
apidemos@apidemos:~/python$ docker build -t python:3.5 .
Once created, we can find the image we just created in our local list of mirrors –
apidemos@apidemos:~/python$ docker images python:3.5
REPOSITORY TAG IMAGE ID CREATED SIZE
python 3.5 045767ddf24a 9 days ago 684.1 MB
Using python image
Create a helloworld.py file in the ~/python/myapp directory with the following code.
#! /usr/bin/python
print("Hello, World!");
Run the container
apidemos@apidemos:~/pythondocker run -vPWD/myapp:/usr/src/myapp -w /usr/src/myapp python:3.5 python helloworld.py
Command description.
-v $PWD/myapp:/usr/src/myapp: Mounts myapp from the current directory in the host to /usr/src/myapp in the container.
-w /usr/src/myapp: Specify the container’s /usr/src/myapp directory as the working directory.
python helloworld.py: Use the container’s python command to execute the helloworld.py file in the working directory.
Output results.
Hello, World!