Recommendation for installing Python modules: pip or Macports

[David Herron]

Let me recommend Docker.  You can use the Python base image, to select your
preferred Python version, and then run pip or pip3 (as appropriate) in the
Dockerfile.  This way installed dependencies are neatly encapsulated, they
do not pollute your host environment, and you have documentation of how the
Python environment is configured.

I demonstrate this in a blog post about OpenADR development using OpenLEADR:
https://techsparx.com/energy-system/openadr/openleadr-docker.html

A simplified Dockerfile would be:

FROM python:3
VOLUME /setup
VOLUME /app
RUN apt-get update && \
        apt-get upgrade -y && \
        apt-get install -y build-essential curl locales
COPY requirements.txt /setup/requirements.txt
RUN pip3 install -r /setup/requirements.txt
python3 /app/app.py


Then, to build it

docker build --tag your-name/your-application-name:latest .

Then it can be launched using a Docker Compose file

services:
  app:
    image: your-name/your-application-name:latest
    volumes:
      - ./app-source-directory:/app/
    networks:
      - adrnet
    environment:
      - PYTHONPATH=... other directories ...:/app
    ports:
      - 8080:8080


And executed with the command:

docker compose up

On your terminal will be logging output.  You can install more services
like databases in the Docker Compose file and manage them all this way.
The source code is dynamically mounted into the running container.  That
means you can edit as you wish.  My blog post demonstrates using Nodemon to
watch the source directory and to automatically restart Python if files
change.

+ David Herron



On Tue, Dec 6, 2022 at 6:53 AM Thomas Gederberg <tgederberg at sbcglobal.net>
wrote:

> It appears that you can either install Python modules (py310-matplotlib,
> py310-numpy, etc) either directly from MacPorts or you can install pip (for
> example py30-pip) with MacPorts and then use pip to install the modules.
>
> Is there a recommendation on which way to go?
>
> Tom Gederberg
>
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