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Ubuntu – YML How to specify python 3.10

I want to start matrix testing for my code. I try running unit test using the yml below on Azure Devops pipelines.

When I run it, it shortens "3.10" to "3.1". How do I avoid that? enter image description here

parameters:
  - name: imageList
    type: object
    default: ["windows-latest", "ubuntu-latest", "windows-2019", "ubuntu-20.04"]
  - name: pythonList
    type: object
    default:
      - "3.11"
      - "3.10" # WHAT TO DO HERE
      - "3.9"

stages:
  - stage: test_on_microsoft_hosted_agents
    jobs:
      - ${{ each image in parameters.imageList }}:
        - job: ${{ replace(replace(image, '-', '_'), '.', '_') }}
          pool:
            vmImage: ${{ image }}
          strategy:
            maxParallel: 1
            matrix:
              ${{ each python in parameters.pythonList }}:
                Python${{ replace(python, '.', '') }}:
                  python.version: "${{ python }}"
                  platform.name: "${{ image }}"
          steps:
            - task: UsePythonVersion@0
              inputs:
                versionSpec: "$(python.version)"
              displayName: "Use Python $(python.version)"
Tags:

3

Answers


  1. 0

    Try specifying using the format function to ensure that the version string remains intact

    parameters:
  - name: imageList
    type: object
    default: ["windows-latest", "ubuntu-latest", "windows-2019", "ubuntu-20.04"]
  - name: pythonList
    type: object
    default:
      - "3.11"
      - "3.10"
      - "3.9"

stages:
  - stage: test_on_microsoft_hosted_agents
    jobs:
      - ${{ each image in parameters.imageList }}:
        - job: ${{ replace(replace(image, '-', '_'), '.', '_') }}
          pool:
            vmImage: ${{ image }}
          strategy:
            maxParallel: 1
            matrix:
              ${{ each python in parameters.pythonList }}:
                Python${{ format('{0:.2f}', python) | replace('.', '') }}:
                  python.version: "${{ python }}"
                  platform.name: "${{ image }}"
          steps:
            - task: UsePythonVersion@0
              inputs:
                versionSpec: "$(python.version)"
              displayName: "Use Python $(python.version)"
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  2. 0

    I try avoiding as much formatting etc work in azure pipelines as possible as it can get cursed, its typically easier (from my experience) to scan the parameter and then toggle a classic matrix based on those values.

    The way I would implement this python versioning strategy is as follows:

    parameters:
  # as is
...
strategy:
  matrix:
    ${{ if contains(parameters.pythonList, '3.8') }}: 
      Python38:
        python.version: '3.8'
    ${{ if contains(parameters.pythonList, '3.9') }}: 
      Python39:
        python.version: '3.9'
    ${{ if contains(parameters.pythonList, '3.10') }}: 
      Python310:
        python.version: '3.10'
    ${{ if contains(parameters.pythonList, '3.11') }}: 
      Python311:
        python.version: '3.11'
    ${{ if contains(parameters.pythonList, '3.12') }}: 
      Python312:
        python.version: '3.12'
...
- task: UsePythonVersion@0
  displayName: 'Use Python Version: $(python.version)'
  inputs:
    versionSpec: '$(python.version)'

    This also removes all the formatting and splitting malarky, and is the way azure recommends handling this versioning stuff

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  3. 0

    This is a dirty workaround, but consider adding a prefix to the version number to force it to be treated as a string, instead of a number.

    Instead of:

    parameters:
  - name: pythonList
    type: object
    default:
      - "3.11"
      - "3.10"
      - "3.9"

    Do:

    parameters:
  - name: pythonList
    type: object
    default:
      - "v3.11"
      - "v3.10"
      - "v3.9"

    Prefix v can be easily removed when setting the version in UsePythonVersion@0 task.

    Example

    trigger: none

parameters:
  - name: imageList
    type: object
    default: 
      - windows-latest
      - ubuntu-latest
      - windows-2019
      - ubuntu-20.04
  - name: pythonList
    type: object
    default:
      - v3.11
      - v3.10
      - v3.9

stages:
  - stage: test_on_microsoft_hosted_agents
    jobs:
      - ${{ each image in parameters.imageList }}:
        - job: ${{ replace(replace(image, '-', '_'), '.', '_') }}
          pool:
            vmImage: ${{ image }}
          strategy:
            maxParallel: 1
            matrix:
              ${{ each python in parameters.pythonList }}:
                Python${{ replace(python, '.', '') }}:
                  python.version: "${{ replace(python, 'v', '') }}" # <--------------- remove 'v' from version
                  platform.name: "${{ image }}"
          steps:
            - task: UsePythonVersion@0
              inputs:
                versionSpec: "$(python.version)"
              displayName: "Use Python $(python.version)"

    Running the pipeline:

    Pipeline jobs and tasks

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