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Python application workflow (jesse-ai/jesse)

The Python application workflow from jesse-ai/jesse, explained and optimized by Latchkey.

A

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Source: jesse-ai/jesse.github/workflows/python-package.ymlLicense MITView source

What it does

This is the Python application workflow from the jesse-ai/jesse repository, a real project running GitHub Actions. It is shown here with attribution under its MIT license.

Below, Latchkey shows a faster, safer version produced by its optimization engine.

The workflow

workflow (.yml)
# This workflow will install Python dependencies, run tests and lint with a single version of Python
# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions

name: Python application

on:
  push:
    branches: [ master ]
  pull_request:
    branches: [ master ]

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

permissions:
  contents: read

jobs:
  build:
    runs-on:  ${{matrix.os}}
    strategy:
      matrix:
        # ubuntu-latest    = Linux x86_64
        # ubuntu-24.04-arm = Linux aarch64 (free for public repos)
        # macos-latest     = Apple Silicon (arm64) on GitHub-hosted runners
        # windows-latest   = Windows x86_64 (no ARM target; Windows-on-ARM excluded)
        os: [ubuntu-latest, ubuntu-24.04-arm, macos-latest, windows-latest]
        python-version: ['3.10', '3.11', '3.12', '3.13']
        exclude:
          # ray has no Windows wheel for Python 3.13 yet (as of ray 2.55.1).
          # Drop this exclude once upstream ships ray-*-cp313-cp313-win_amd64.whl.
          - os: windows-latest
            python-version: '3.13'

    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Set up Python ${{ matrix.python-version }}
        uses: actions/setup-python@v6
        with:
          python-version: ${{ matrix.python-version }}
          cache: pip
      - name: Install dependencies
        shell: bash
        run: |
          python -m ensurepip --upgrade
          python -m pip install --upgrade pip
          python -m pip install setuptools wheel
          if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
          pip install -e . -U
      - name: Test with pytest
        shell: bash
        env:
          PYTEST_DISABLE_PLUGIN_AUTOLOAD: 1
        run: |
          python -m pytest

The same workflow, on Latchkey

Removes redundant runs and caps runaway jobs. Added and changed lines are highlighted.

# This workflow will install Python dependencies, run tests and lint with a single version of Python
# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
 
name: Python application
 
on:
  push:
    branches: [ master ]
  pull_request:
    branches: [ master ]
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
permissions:
  contents: read
 
jobs:
  build:
    timeout-minutes: 30
    runs-on:  ${{matrix.os}}
    strategy:
      matrix:
        # ubuntu-latest    = Linux x86_64
        # ubuntu-24.04-arm = Linux aarch64 (free for public repos)
        # macos-latest     = Apple Silicon (arm64) on GitHub-hosted runners
        # windows-latest   = Windows x86_64 (no ARM target; Windows-on-ARM excluded)
        os: [ubuntu-latest, ubuntu-24.04-arm, macos-latest, windows-latest]
        python-version: ['3.10', '3.11', '3.12', '3.13']
        exclude:
          # ray has no Windows wheel for Python 3.13 yet (as of ray 2.55.1).
          # Drop this exclude once upstream ships ray-*-cp313-cp313-win_amd64.whl.
          - os: windows-latest
            python-version: '3.13'
 
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Set up Python ${{ matrix.python-version }}
        uses: actions/setup-python@v6
        with:
          python-version: ${{ matrix.python-version }}
          cache: pip
      - name: Install dependencies
        shell: bash
        run: |
          python -m ensurepip --upgrade
          python -m pip install --upgrade pip
          python -m pip install setuptools wheel
          if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
          pip install -e . -U
      - name: Test with pytest
        shell: bash
        env:
          PYTEST_DISABLE_PLUGIN_AUTOLOAD: 1
        run: |
          python -m pytest
 

What changed

What Latchkey heals here

This workflow has steps that commonly fail on transient issues (network, registries, flaky browsers). On Latchkey managed runners they are detected, retried, and self-healed instead of failing your build:

This workflow runs 1 job (16 with the matrix expanded) per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.

Actions used in this workflow