Update Pulumi python docker image to python 3.9

[followben]

Latest stable image is 3.9.4.

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[slaiyer]

Can we consider leaving out the patch version?
python:3.9-slim-buster seems like a better idea to me, given that patch versions bring in bugfixes and security updates.

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[followben]

Sorry about the noise on this one @slaiyer - pebkac. Agreed generic 3.9 build is better - updated!

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[komalali]

/run-acceptance-tests

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Please view the results of the PR Build + Acceptance Tests Run Here

[stack72]

Hi @followben

thanks for the PR here - the file you have updated is only actually 1 of the containers we build. We would need to reflect the same change in:

• docker/Python/Docker.alpine
• docker/pulumi/Dockerfile

It wouldn't be correct to only have 1 of our containers on the latest Python. If you feel that is outside the scope of your PR then I can follow behind with this change

Thanks again

Paul

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[followben]

Thanks for the feedback @stack72 - I was being selfish as we only needed the default image updated. Agreed they should be in sync tho. As it turns out that was the source of my problem as they were already on different versions for some reason (default on 3.7.7, alpine on 3.8.3 and debian on 3.9.x).

That's fixed now - all on the latest release of 3.9.

[stack72]

Thanks so much @followben

I'll get these merged and in our next release!!

I appreciate the PR here!