welikecode/python2-final repository overview

⁠python2-final

Final python 2 - Python 2.7.18 in a docker alpine version; Based on jfloff / alpine-python

⁠Docker

Alpine Python 2.7.18 - the last version of Python 2. We will miss you Python 2 ..

⁠Pip Dependencies

Pip dependencies can be installed by the -p switch, or a requirements.txt file.

If the file is at /requirements.txt it will be automatically read for dependencies. If not, use the -P or -r switch to specify a file.

# This runs interactive Python with 'simplejson' and 'requests' installed
docker run --rm -ti jfloff/alpine-python:2.7-slim -p simplejson -p requests

# Don't forget to add '--' after your dependencies to run a custom command:
docker run --rm -ti jfloff/alpine-python:2.7-slim -p simplejson -p requests -- python hello.py

# This accomplishes the same thing by mounting a requirements.txt in:
echo 'simplejson' > requirements.txt
echo 'requests' > requirements.txt
docker run --rm -ti \
  -v requirements.txt:/requirements.txt \
  jfloff/alpine-python:2.7-slim python hello.py

# This does too, but with the file somewhere else:
echo 'simplejson requests' > myapp/requirements.txt
docker run --rm -ti \
  -v myapp:/usr/src/app \
  jfloff/alpine-python:2.7-slim \
    -r /usr/src/app/requirements.txt \
    -- python /usr/src/app/hello.py

⁠Run-Time Dependencies

Alpine package dependencies can be installed by the -a switch, or an apk-requirements.txt file.

If the file is at /apk-requirements.txt it will be automatically read for dependencies. If not, use the -A switch to specify a file.

You can also try installing some Python modules via this method, but it is possible for Pip to interfere if it detects a version problem.

# Unknown why you'd need to do this, but you can!
docker run --rm -ti jfloff/alpine-python:2.7-slim -a openssl -- python hello.py

# This installs libxml2 module faster than via Pip, but then Pip reinstalls it because Ajenti's dependencies make it think it's the wrong version.
docker run --rm -ti jfloff/alpine-python:2.7-slim -a py-libxml2 -p ajenti

⁠Build-Time Dependencies

Build-time Alpine package dependencies (such as compile headers) can be installed by the -b switch, or a build-requirements.txt file. They will be removed after the dependencies are installed to save space.

If the file is at /build-requirements.txt it will be automatically read for dependencies. If not, use the -B switch to specify a file.

build-base, linux-headers and python-dev are always build dependencies, you don't need to include them.

docker run --rm -ti jfloff/alpine-python:2.7-slim \
  -p gevent \
  -p libxml2 \
  -b libxslt-dev \
  -b libxml-dev \
  -- python hello.py

⁠Creating Images

Similar to the onbuild images, dependencies can be baked into a new image by using a custom Dockerfile, e.g:

FROM jfloff/alpine-python:2.7-slim
RUN /entrypoint.sh \
  -p ajenti-panel \
  -p ajenti.plugin.dashboard \
  -p ajenti.plugin.settings \
  -p ajenti.plugin.plugins \
  -b libxml2-dev \
  -b libxslt-dev \
  -b libffi-dev \
  -b openssl-dev \
&& echo
CMD ["ajenti-panel"]
# you won't be able to add more dependencies later though-- see 'Debugging'

⁠Debugging

The /entrypoint.sh script that manages dependencies in the slim images creates an empty file, /requirements.installed, telling the script not to install any dependencies after the container's first run. Removing this file will allow the script to work again if it is needed.

You can use the -x flag to see everything the /entrypoint.sh script is doing.

You can also access bash inside the container:

docker run --rm -ti jfloff/alpine-python:2.7-slim bash

⁠Additional Arguments

-q: silences output from /entrypoint.sh -x: turns on Bash debugging, making the output very verbose.

⁠Ecosystem

These are some of the images that use jfloff/alpine-python as base image. If you have another image that uses this as base image, please submit an issue or PR for it to be added. Image has to be published on Docker Hub.

• jfloff/alscipy⁠ : image with common packages for Science in Alpine Python.
• jfloff/pywfm⁠ : image from the python wrapper for Steffen Rendle's factorization machines library libFM.
• bismuthfoundation/Bismuth-Docker⁠ : node and associated services, from scratch crypto-currency with Python codebase.

⁠Contribution

Feel free to contribute with whatever you feel like this image is missing. There is also some changes that happen often like, updating Alpine or Python versions. Do not forget that this repo folders mirror Python version and not Alpine versions.