Sourced from jaxlib's changelog.

jax 0.4.34 (October 4, 2024)

• New Functionality

  • This release includes wheels for Python 3.13. Free-threading mode is not yet supported.
  • jax.errors.JaxRuntimeError has been added as a public alias for the formerly private XlaRuntimeError type.

• Breaking changes

  • jax_pmap_no_rank_reduction flag is set to True by default.
    • array[0] on a pmap result now introduces a reshape (use array[0:1] instead).
    • The per-shard shape (accessable via jax_array.addressable_shards or jax_array.addressable_data(0)) now has a leading (1, ...). Update code that directly accesses shards accordingly. The rank of the per-shard-shape now matches that of the global shape which is the same behavior as jit. This avoids costly reshapes when passing results from pmap into jit.
  • jax.experimental.host_callback has been deprecated since March 2024, with JAX version 0.4.26. Now we set the default value of the --jax_host_callback_legacy configuration value to True, which means that if your code uses jax.experimental.host_callback APIs, those API calls will be implemented in terms of the new jax.experimental.io_callback API. If this breaks your code, for a very limited time, you can set the --jax_host_callback_legacy to True. Soon we will remove that configuration option, so you should instead transition to using the new JAX callback APIs. See {jax-issue}[#20385](https://github.com/jax-ml/jax/issues/20385) for a discussion.

• Deprecations

  • In {func}jax.numpy.trim_zeros, non-arraylike arguments or arraylike arguments with ndim != 1 are now deprecated, and in the future will result in an error.
  • Internal pretty-printing tools jax.core.pp_* have been removed, after being deprecated in JAX v0.4.30.
  • jax.lib.xla_client.Device is deprecated; use jax.Device instead.
  • jax.lib.xla_client.XlaRuntimeError has been deprecated. Use jax.errors.JaxRuntimeError instead.

• Deletion:

  • jax.xla_computation is deleted. It's been 3 months since it's deprecation in 0.4.30 JAX release. Please use the AOT APIs to get the same functionality as jax.xla_computation.
    • jax.xla_computation(fn)(*args, **kwargs) can be replaced with jax.jit(fn).lower(*args, **kwargs).compiler_ir('hlo').
    • You can also use .out_info property of jax.stages.Lowered to get the output information (like tree structure, shape and dtype).
    • For cross-backend lowering, you can replace jax.xla_computation(fn, backend='tpu')(*args, **kwargs) with jax.jit(fn).trace(*args, **kwargs).lower(lowering_platforms=('tpu',)).compiler_ir('hlo').
  • {class}jax.ShapeDtypeStruct no longer accepts the named_shape argument. The argument was only used by xmap which was removed in 0.4.31.

... (truncated)

• affba36 JAX 0.4.34 release
• 59cb692 Update XLA dependency to use revision
• 8fc8082 Merge pull request #24077 from jakevdp:badge-links
• cfb7541 Merge pull request #23738 from keshavb96:disable_remat_pass
• 78b65dd Merge pull request #24070 from jakevdp:issubdtype-doc
• a8744e3 README: fix badge href links
• 152a873 Update XLA dependency to use revision
• c9f946e Only thread a discharged ref value through a cond when it changes in some branch
• 816947b Merge pull request #24071 from hawkinsp:winci
• e212c77 Merge pull request #23891 from ROCm:build-fixes-rollup
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