"Invalid constraint" message for package dependencies, but they are valid for pip

• I am on the latest Poetry version.

• I have searched the issues of this repo and believe that this is not a duplicate.

• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: Docker debian bullseye

• Poetry version: 1.1.11

Issue

> poetry add markdown==3.3.5

Updating dependencies
Resolving dependencies... (0.0s)PackageInfo: Invalid constraint (importlib-metadata (>='4.4') ; python_version < "3.10") found in markdown-3.3.5 dependencies, skipping
Resolving dependencies... (0.1s)

Writing lock file

No dependencies to install or update

Full discussion on markdown package https://github.com/Python-Markdown/markdown/issues/1195, where they are saying that the versioning is correct and this is a Poetry problem. I’m no expert, but given it can install with pip, I think this likely is a Poetry issue.

[kevr]

I’m getting the same issue here; same exact package.

However, I’ve gone a bit further here and found that markdown==3.3.4 still works fine. I’m not sure if this is a severe poetry screw-up at this point with versioning, but I’m thinking that it’s a markdown issue, not a poetry issue, based on the fact that 3.3.4 works fine and 3.3.5 doesn’t; they obviously changed versioning between these.

Not to say that it’s not an issue in poetry, but, clearly the issue can be worked around as was < 3.3.5.

[abn]

Resolved in markdown via https://github.com/Python-Markdown/markdown/pull/1197.