Miscelanous cleanup (#9619)

Author: qihqi

torchax/README.md

@@ -97,11 +97,14 @@ inputs = torch.randn(3, 3, 28, 28, device='jax')
 m = MyModel().to('jax')
 res = m(inputs)
 print(type(res))  # outputs torchax.tensor.Tensor
+print(res.jax()) # print the underlying Jax Array
 ```
 
 `torchax.tensor.Tensor` is a `torch.Tensor` subclass that holds
 a `jax.Array`. You can inspect that JAX array with `res.jax()`.
 
+In other words, despite that the code above looks like PyTorch, it is actually running JAX!
+
 ## What is happening behind the scene
 
 We took the approach detailed in the

torchax/dev-requirements.txt

@@ -1,5 +1,5 @@
 -f https://download.pytorch.org/whl/torch
-torch==2.7.1 ; sys_platform == 'darwin'  # macOS
-torch==2.7.1+cpu; sys_platform != 'darwin' # Non-macOS (CPU-only), like on TPU
+torch==2.8.0 ; sys_platform == 'darwin'  # macOS
+torch==2.8.0+cpu; sys_platform != 'darwin' # Non-macOS (CPU-only), like on TPU
 yapf==0.40.2  # N.B.: keep in sync with `infra/ansible/config/pip.yaml`, `.github/workflows/lintercheck.yml`
 flax==0.10.6

torchax/examples/_diffusion.py

@@ -48,6 +48,3 @@ odml = ["jax[cpu]>=0.6.2", "jax[cpu]"]
 
 [tool.hatch.build.targets.wheel]
 packages = ["torchax"]
-
-[tool.pytest.ini_options]
-addopts="-n auto"

torchax/examples/_grad_of_attention.py

@@ -2,9 +2,8 @@
 absl-py==2.2.2
 immutabledict==4.2.1
 pytest==8.3.5
-pytest-xdist==3.6.1
-pytest-forked==1.6.0
-sentencepiece==0.2.0
+sentencepiece
 expecttest==0.3.0
 optax==0.2.4
-tensorflow==2.19.0
+pytest
+pytest-xdist

torchax/examples/torchbench_models/BERT_pytorch.py

@@ -31,6 +31,17 @@ def forward(self, a, b):
             jnp.sin(jnp.array([1, 2, 3])) + jnp.cos(jnp.array([3, 4, 5]))))
 
   def test_to_device(self):
+    env = torchax.default_env()
+    with env:
+      step1 = torch.ones(
+          100,
+          100,
+      )
+      step2 = torch.triu(step1, diagonal=1)
+      step3 = step2.to(dtype=torch.bool, device='jax')
+      self.assertEqual(step3.device.type, 'jax')
+
+  def test_to_device_twice(self):
     env = torchax.default_env()
     env.config.debug_print_each_op = True
     with env:
@@ -40,6 +51,7 @@ def test_to_device(self):
       )
       step2 = torch.triu(step1, diagonal=1)
       step3 = step2.to(dtype=torch.bool, device='jax')
+      step3.to('jax')
       self.assertEqual(step3.device.type, 'jax')