Cannot install package: resolution impossible because optax has new version

[IamJeffG]

I came in this morning and can no longer install the perch package. I tracked it down to this commit in a transitive dependency: google-deepmind/optax@beae523

In short:

• chirp requires optax < 0.2.0
• chirp requires scenic
• scenic requires the latest version of optax, which is 0.2.0.dev, i.e. conflicting with chirp's own requirement.

scenic doesn't have tagged releases that perch can specify, so a resolution to this issue is probably going to have to require the scenic authors to constrain their own dependency on optax (unlikely?) or say perch itself can accept optax 0.2.*.

$ pip install "chirp @ git+https://github.com/google-research/perch.git@77edeff5800be0cc1af81bf8c078f70a1ad82f79"
<snip a bunch of logs>
ERROR: Cannot install chirp and chirp==0.1.0 because these package versions have conflicting dependencies.

The conflict is caused by:
    chirp 0.1.0 depends on optax<0.2.0 and >=0.1.7
    flax 0.7.4 depends on optax
    scenic 0.0.1 depends on optax 0.2.0.dev0 (from git+https://github.com/google-deepmind/optax.git@main)

To fix this you could try to:
1. loosen the range of package versions you've specified
2. remove package versions to allow pip attempt to solve the dependency conflict

ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/topics/dependency-resolution/#dealing-with-dependency-conflicts

[sdenton4]

BTW, I believe this is fixed by a recent commit:
3cdb69a

[IamJeffG]

Confirmed fixed, closing.