Hi folks I discovered Meltano 48 hours ago but I m super int Meltano #getting-started

Hi folks, I discovered Meltano 48 hours ago, but I...

jeff_mcmahon

07/07/2021, 6:29 PM

Hi folks, I discovered Meltano 48 hours ago, but I’m super interested. I’m attempting to stand up a demo instance using the Getting-Started docs on the site. I’ve deployed a new instance of Ubuntu using Vagrant/VirtualBox on my MacBP - installed latest Python3 (3.9.5) and followed the install process. I understand that the latest Meltano is sitting at 1.77.0 but when I

pip3 install meltano

I end up with 1.67.0. When attempting to

meltano init test1

I end up with the following…

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(.venv) vagrant@ubuntu-hirsute:/vagrant$ meltano init test1
Created test1
Creating project files...
Created test1/meltano.yml
Created test1/README.md
Created test1/requirements.txt
Created test1/.gitignore
Created test1/model/.gitkeep
Created test1/extract/.gitkeep
Created test1/load/.gitkeep
Created test1/transform/.gitkeep
Created test1/analyze/.gitkeep
Created test1/notebook/.gitkeep
Created test1/orchestrate/.gitkeep
[2021-07-07 18:00:40,484] [8684|MainThread|meltano.core.project] [CRITICAL] Could not update meltano.yml: [Errno 22] Invalid argument
[Errno 22] Invalid argument

jeff_mcmahon

07/07/2021, 6:32 PM

… and when I attempt to

meltano upgrade

the package reports back that it is already

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(.venv) vagrant@ubuntu-hirsute:/vagrant/test1$ meltano upgrade
Upgrading `meltano` package...
Requirement already satisfied: meltano in /vagrant/.venv/lib/python3.9/site-packages (1.67.0)
Collecting meltano

jeff_mcmahon

07/07/2021, 6:39 PM

… an interesting message in the upgrade output is

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Recompiling models...
[2021-07-07 18:31:29,360] [10195|MainThread|root] [WARNING] The `discovery.yml` manifest received from <https://www.meltano.com/discovery.yml> has version 18, while this version of Meltano requires version 16.
[2021-07-07 18:31:29,360] [10195|MainThread|root] [WARNING] Please install the latest compatible version of Meltano using `meltano upgrade`.

jeff_mcmahon

07/07/2021, 6:39 PM

suggests that I need the latest Meltano, but I’m a bit stuck

visch

07/07/2021, 6:50 PM

Team can probably share more of the why but ``python = ">=3.6.2,<3.9"` Meltano isn't approved on Python 3.9 and higher yet. Go to 3.8 something and you should be good

visch

07/07/2021, 6:51 PM

https://gitlab.com/meltano/meltano/-/issues/2545

jeff_mcmahon

07/07/2021, 7:02 PM

Amazing - thanks @visch - I’ll give that a try

aaronsteers

07/07/2021, 7:52 PM

I can share more background on the "why" - we added the

<3.9

constraint when we found compatibility issues with 3.9 in some libraries. However, it looks like your resolver is just going back in time to install a version of Meltano that didn't have that constraint.

aaronsteers

07/07/2021, 7:54 PM

Perhaps others would have predicted this, but I didn't expect this behavior myself. All the more reason to expedite 3.9 support.

jeff_mcmahon

07/07/2021, 8:06 PM

Appreciate the followup - what an incredible community you have built !!

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