How to run jobs/stages/builds(?) for different versions of Python?

Travis CI Discussions & Feedback
1

Hey guys! I recently started using Travis and I have a problem.

I have the following .travis.yml:

language: python

python:
  - "3.9.6"
  - "3.10.1"
  - "3.11.0"

before_install:
  - curl -sSL https://install.python-poetry.org | python - --version 1.4.0

install:
  - poetry install --no-ansi

script:
  - echo "Linter"
  - echo "SonarQube"
  - echo "pytest"
  - echo "mkdocs"

stages:
  - name: Staging
    if: branch = staging

  - name: Production
    if: branch = production

jobs:
  include:
    - stage: Staging
      python: "3.9.6" 
      before_install:
        - curl -sSL https://install.python-poetry.org | python - --version 1.4.0
      install:
        - poetry install --no-ansi
      script:
        - echo "Staging - script"

    - stage: Staging
      python: "3.10.1" 
      before_install:
        - curl -sSL https://install.python-poetry.org | python - --version 1.4.0
      install:
        - poetry install --no-ansi
      script:
        - echo "Staging - script"

    - stage: Production
      install:
        - echo "Production - installation"
      script:
        - echo "Production - script"

I want to test my application in the three versions of Python, in addition to running the stages according to the condition (also in the three versions of Python).

With this format, the stage runs in the two versions I mentioned, but it seems kind of redundant to have to create a stage for each version of python. However, it runs the stage first and then the normal test.

How do I fix this?