#244: vendorizing your Python podcast

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About the show

Sponsored by us:

• Check out the courses over at Talk Python
• And Brian’s book too!

Special guest: Brandon Braner

Brian #1: pip Environmental Variables

• The problem with snakes on a plane → no internet
• Situation:
  • want to work on some code on a plane
  • project set up to use tox, which creates venvs, and pip installs dependencies from pypi.org.
  • but… no internet
• Preflight work:
  • run tox with an internet connection
  • copy everything from all of the “site-packages” directories under “.tox” into a “wheels” directory or whatever you want to call it.
  • set environmental variables:
  • PIP_FIND_LINKS=file:/Users/okken/wheels
  • PIP_NO_INDEX=1
  • Try this out first BEFORE getting on the plane, to make sure you didn’t miss anything.
• In flight:
  • tox works fine now, using local dir as index
• Thanks Paul Ganssle for helping with this.
• All command line flags for pip are available as env variables:
  • “pip’s command line options can be set with environment variables using the format PIP_[HTML_REMOVED] . Dashes (-) have to be replaced with underscores (_).”

Michael #2: Extra, Extra, 6x Extra, hear all about it

• Michael’s Pydantic talk
• Little Automation Tools in Python episode
• A Day in Code- Python: Learn to Code in Python through an Illustrated Story Released by Shari Eskenas
• TabNine AI complete
• macOS photos follow up
• jinja-partials
• chameleon-partials
• fastapi-chameleon

Brandon #3: Kaggle 30 Days of Machine Learning

• What is Kaggle
  1. Find and publish data sets
  2. Explore and build models in a web-based data-science environment(Jupyter Notebooks)
  3. Work with other data scientists and machine learning engineers
  4. Enter competitions to solve data science challenges.
• Starts August 2nd, 2021
• Has an introduction to Python and covers basic and intermediate machine learning concepts
• Get some completion certificates
• Kaggle competition at the end with teams of 3

Brian #4: Building and testing Python with GitHub Actions

• GitHub Docs
• This is an incredible resource
• I suggest starting with Running tests with tox, as it’s a super simple setup.
• And, you can test all of the tox environments locally.

      name: Python package
  
      on: [push, pull_request]
  
      jobs:
        build:
  
          runs-on: ubuntu-latest
          strategy:
            matrix:
              python: [3.7, 3.8, 3.9, 3.10-dev]
  
          steps:
            - uses: actions/checkout@v2
            - name: Setup Python
              uses: actions/setup-python@v2
              with:
                python-version: ${{ matrix.python }}
            - name: Install Tox and any other packages
              run: pip install tox
            - name: Run Tox
              run: tox -e py
  

Michael #5: python-vendorize

• via Patrick Park
• Vendoring a dependency means basically copying it into your package or your app rather than installing and importing it externally.
• Here’s a simple way to do that.
• python-vendorize allows pure-Python dependencies to be vendorized

• vendorize.toml might look something like:

      target = "your_app/_vendor"
      packages = [
          "six",
      ]
  

• run python-vendorize in the same directory as vendorize.toml

• In your_app.py, six can be imported from _vendor:

      from ._vendor import six
  

Brandon #6: Supabase and the new Python library

• Supabase is an open source Firebase Alternative
• Postgres Database, Authentication, instant APIs, realtime subscriptions and Storage
• uses:
  • https://postgrest.org/en/stable/ for rest api access to your database
  • GoTrue from Netlify for handling user authentication https://github.com/netlify/gotrue
  • Realtime client built in Elixir to listen to Postgres changes. https://github.com/supabase/realtime
  • Supabase local so you don’t need internet to develop your project https://supabase.io/docs/guides/local-development

Extras

• The Baked Data architectural pattern
  • Simon Willison
  • “Baked Data: bundling a read-only copy of your data alongside the code for your application, as part of the same deployment”
• Released service - released.sh

Joke

The (tech) circle of life