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Summary
This PR fixes a JAX tracer-compatibility issue in
disco_rl/networks/meta_nets.pythat can fail learner updates underjax.jit/lax.scanbecause of strictisinstance(..., chex.Array)checks.Changes
isinstancechecks with tracer-safe array-like checks based on.shape.TypeErrorfor non-array-like values.disco_rl/networks/meta_nets_test.pythat runsagent.learner_stepunderjax.jit.Verification
PYTHONPATH=. python -m unittest disco_rl.networks.meta_nets_test -vpasses with this patch.meta_nets.py:93(assert isinstance(logits, chex.Array)).