Finalize some deprecations in jax.core, jax.lib.xla_bridge, and jax.lib.xla_client.

CHANGELOG.md

@@ -19,6 +19,11 @@ When releasing, please add the new-release-boilerplate to docs/pallas/CHANGELOG.
     APIs of the same name in {mod}`jax.extend.core`; see the documentation for
     {mod}`jax.extend` for information on the compatibility guarantees of these
     semi-public extensions.
+  * Several previously-deprecated APIs have been removed, including:
+    * from {mod}`jax.core`: `check_eqn`, `check_type`,  `check_valid_jaxtype`, and
+      `non_negative_dim`.
+    * from {mod}`jax.lib.xla_bridge`: `xla_client` and `default_backend`.
+    * from {mod}`jax.lib.xla_client`: `_xla` and `bfloat16`.
 
 ## jax 0.4.37 (Dec 9, 2024)
 

docs/jax.lib.rst

@@ -11,7 +11,6 @@ jax.lib.xla_bridge
 .. autosummary::
   :toctree: _autosummary
 
-  default_backend
   get_backend
   get_compile_options
 

jax/core.py

@@ -160,13 +160,16 @@ _deprecations = {
     "Var": ("jax.core.Var is deprecated. Use jax.extend.core.Var instead, "
             "and see https://jax.readthedocs.io/en/latest/jax.extend.html for details.",
             _src_core.Var),
-    # Added 2024-08-14
-    "check_eqn": ("jax.core.check_eqn is deprecated.", _src_core.check_eqn),
-    "check_type": ("jax.core.check_type is deprecated.", _src_core.check_type),
+    # Finalized 2024-12-11; remove after 2025-3-11
+    "check_eqn": ("jax.core.check_eqn was removed in JAX v0.4.38.", None),
+    "check_type": ("jax.core.check_type was removed in JAX v0.4.38.", None),
     "check_valid_jaxtype": (
-      ("jax.core.check_valid_jaxtype is deprecated. Instead, you can manually"
+      ("jax.core.check_valid_jaxtype was removed in JAX v0.4.38. Instead, you can manually"
        " raise an error if core.valid_jaxtype() returns False."),
-      _src_core.check_valid_jaxtype),
+      None),
+    "non_negative_dim": (
+      "jax.core.non_negative_dim was removed in JAX v0.4.38. Use max_dim(..., 0).", None,
+    ),
     # Finalized 2024-09-25; remove after 2024-12-25
     "pp_aval": ("jax.core.pp_aval was removed in JAX v0.4.34.", None),
     "pp_eqn": ("jax.core.pp_eqn was removed in JAX v0.4.34.", None),
@@ -180,10 +183,6 @@ _deprecations = {
     "pp_kv_pairs": ("jax.core.pp_kv_pairs was removed in JAX v0.4.34.", None),
     "pp_var": ("jax.core.pp_var was removed in JAX v0.4.34.", None),
     "pp_vars": ("jax.core.pp_vars was removed in JAX v0.4.34.", None),
-    # Added Jan 8, 2024
-    "non_negative_dim": (
-      "jax.core.non_negative_dim is deprecated. Use max_dim(..., 0).", _src_core.non_negative_dim,
-    ),
 }
 
 import typing
@@ -207,9 +206,6 @@ if typing.TYPE_CHECKING:
   Var = _src_core.Var
   axis_frame = _src_core.axis_frame
   call_p = _src_core.call_p
-  check_eqn = _src_core.check_eqn
-  check_type = _src_core.check_type
-  check_valid_jaxtype = _src_core.check_valid_jaxtype
   closed_call_p = _src_core.closed_call_p
   concrete_aval = _src_core.concrete_aval
   dedup_referents = _src_core.dedup_referents
@@ -223,7 +219,6 @@ if typing.TYPE_CHECKING:
   lattice_join = _src_core.lattice_join
   leaked_tracer_error = _src_core.leaked_tracer_error
   maybe_find_leaked_tracers = _src_core.maybe_find_leaked_tracers
-  non_negative_dim = _src_core.non_negative_dim
   raise_to_shaped = _src_core.raise_to_shaped
   raise_to_shaped_mappings = _src_core.raise_to_shaped_mappings
   reset_trace_state = _src_core.reset_trace_state

jax/lib/xla_bridge.py

@@ -14,9 +14,7 @@
 
 # ruff: noqa: F401
 from jax._src.xla_bridge import (
-  default_backend as _deprecated_default_backend,
   get_backend as _deprecated_get_backend,
-  xla_client as _deprecated_xla_client,
 )
 
 from jax._src.compiler import (
@@ -25,25 +23,24 @@ from jax._src.compiler import (
 
 _deprecations = {
   # Added July 31, 2024
-  "xla_client": (
-    "jax.lib.xla_bridge.xla_client is deprecated; use jax.lib.xla_client directly.",
-    _deprecated_xla_client
-  ),
   "get_backend": (
     "jax.lib.xla_bridge.get_backend is deprecated; use jax.extend.backend.get_backend.",
     _deprecated_get_backend
   ),
+  # Finalized 2024-12-11; remove after 2025-3-11
+  "xla_client": (
+    "jax.lib.xla_bridge.xla_client was removed in JAX v0.4.38; use jax.lib.xla_client directly.",
+    None
+  ),
   "default_backend": (
-    "jax.lib.xla_bridge.default_backend is deprecated; use jax.default_backend.",
-    _deprecated_default_backend
+    "jax.lib.xla_bridge.default_backend was removed in JAX v0.4.38; use jax.default_backend.",
+    None
   ),
 }
 
 import typing as _typing
 if _typing.TYPE_CHECKING:
-  from jax._src.xla_bridge import default_backend as default_backend
   from jax._src.xla_bridge import get_backend as get_backend
-  from jax._src.xla_bridge import xla_client as xla_client
 else:
   from jax._src.deprecations import deprecation_getattr as _deprecation_getattr
   __getattr__ = _deprecation_getattr(__name__, _deprecations)

jax/lib/xla_client.py

@@ -27,14 +27,14 @@ OpSharding = _xc.OpSharding
 Traceback = _xc.Traceback
 
 _deprecations = {
-    # Added Aug 5 2024
+    # Finalized 2024-12-11; remove after 2025-3-11
     "_xla": (
-        "jax.lib.xla_client._xla is deprecated; use jax.lib.xla_extension.",
-        _xc._xla,
+        "jax.lib.xla_client._xla was removed in JAX v0.4.38; use jax.lib.xla_extension.",
+        None,
     ),
     "bfloat16": (
-        "jax.lib.xla_client.bfloat16 is deprecated; use ml_dtypes.bfloat16.",
-        _xc.bfloat16,
+        "jax.lib.xla_client.bfloat16 was removed in JAX v0.4.38; use ml_dtypes.bfloat16.",
+        None,
     ),
     # Added Sep 26 2024
     "Device": (
@@ -104,8 +104,6 @@ _deprecations = {
 import typing as _typing
 
 if _typing.TYPE_CHECKING:
-  _xla = _xc._xla
-  bfloat16 = _xc.bfloat16
   dtype_to_etype = _xc.dtype_to_etype
   ops = _xc.ops
   register_custom_call_target = _xc.register_custom_call_target