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py install 3-dev doesn't install prerelease #428
Description
It should be installing 3.16.0a1, but it's still trying to get 3.15.0. py install 3.16-dev works.
Somewhere in the install/match logic we are checking whether the requested tag is prerelease and using that to allow selecting a prerelease version on the first pass. Clearly that isn't working properly and needs to be fixed.
Activity
zooba commentedon Oct 29, 2026
This also needs to handle all places where
-devmay be specified in a tag, includinglistandexeccommands. It needs to behave consistently in each of these places, and shouldn't change the behaviour of any other tags.We also should assume that we can't change the publishing process that puts
3-devin every release (pre- or final), though that is technically possible if it turns out to be necessary (it probably involves updating the repartition script to convert existing entries, but things are much better if we don't have to do this).Also bear in mind that
-devis an arbitrary part of a tag, not a specified syntax. The only sensible match we can do is inCompanyTagto check_sortkey[-1] == "dev"(or some similar equivalent) and we just have to call this a special case. Actual prerelease version specifications won't match final release tags, so there's nothing to change there. It's just3[.x]-devthat will match a final even when we'd prefer to choose a prerelease.