Reintroduce sampling_jax.py for backward compatibility

This is a separate commit to make sure that git tracks the rename
of the old `sampling_jax.py` to `sampling/jax.py` correctly.

pymc/sampling/jax.py

@@ -37,6 +37,14 @@
 warnings.warn("This module is experimental.")
 
 
+__all__ = (
+    "get_jaxified_graph",
+    "get_jaxified_logp",
+    "sample_blackjax_nuts",
+    "sample_numpyro_nuts",
+)
+
+
 @jax_funcify.register(Assert)
 @jax_funcify.register(CheckParameterValue)
 @jax_funcify.register(SpecifyShape)

pymc/sampling_jax.py

@@ -0,0 +1,7 @@
+# This file exists only for backward-compatibility with imports like
+# `import pymc.sampling_jax` or `from pymc import sampling_jax`.
+
+# pylint: disable=wildcard-import
+# pylint: disable=unused-wildcard-import
+
+from pymc.sampling.jax import *

pymc/tests/sampling/test_jax.py

@@ -16,6 +16,14 @@
 
 import pymc as pm
 
+
+def test_old_import_route():
+    import pymc.sampling.jax as new_sj
+    import pymc.sampling_jax as old_sj
+
+    assert set(new_sj.__all__) <= set(dir(old_sj))
+
+
 with pytest.warns(UserWarning, match="module is experimental"):
     from pymc.sampling.jax import (
         _get_batched_jittered_initial_points,

scripts/run_mypy.py

@@ -50,6 +50,7 @@
 pymc/ode/ode.py
 pymc/ode/utils.py
 pymc/plots/__init__.py
+pymc/sampling_jax.py
 pymc/sampling/__init__.py
 pymc/sampling/forward.py
 pymc/sampling/mcmc.py