pip and python3 mismatch on macos-14 runners

[tstellar]

Description

It appears that the default pip binary and default python3 binary on the macos-14 runners use different python installs. So any python modules you install via pip are cannot be found by python3.

Platforms affected

• Azure DevOps
• GitHub Actions - Standard Runners
• GitHub Actions - Larger Runners

Runner images affected

• Ubuntu 20.04
• Ubuntu 22.04
• Ubuntu 24.04
• macOS 12
• macOS 13
• macOS 13 Arm64
• macOS 14
• macOS 14 Arm64
• Windows Server 2019
• Windows Server 2022

Image version and build link

Runner Version: 20240728.1

https://github.com/tstellar/llvm-project/actions/runs/10223278047/job/28289331074

Is it regression?

Yes, it was working with 20240722.3

Expected behavior

Python3 should be able to import modules installed via pip.

Actual behavior

pip install pygithub
python3 -c 'import github'

Traceback (most recent call last):
  File "<string>", line 1, in <module>
ModuleNotFoundError: No module named 'github'

Repro steps

You can reproduce the problem with this workflow:

name: Test Python

on:
  push:

permissions:
  contents: read # Default everything to read-only

jobs:
  test-python:
    runs-on: macos-14
    steps:
      - shell: bash
        run: |
          pip install pygithub
          python3 -c 'import github'

[prasanjitsahoo]

Hi @tstellar, We are looking in to it.

[prasanjitsahoo]

Hi @tstellar,

We could see the above behaviour only for ARM64 based images. We will check more on it and keep you posted on our investigation.
Currently, you can use the below two solutions to continue with our ARM64 images.

Solution-1: Use setup-python actions

steps:
  - uses: actions/checkout@v4
  - uses: actions/setup-python@v5
    with:
      python-version: '3.12'
  - name: Install PyGithub
    run: |
      pip install pygithub
      python3 -c 'import github'

Solution-2: To install a Python library, we can use a virtual environment

steps:
  - name: Install PyGithub
    run: |
      python3 -m venv .venv
      source .venv/bin/activate
      pip install pygithub
      python3 -c 'import github'