Add direct cast to numpy array in SimpleProxy getitem

Author: Luke Shaw

src/blosc2/proxy.py

@@ -667,7 +667,7 @@ def __getitem__(self, item: slice | list[slice]) -> np.ndarray:
         out: numpy.ndarray
             An array with the data slice.
         """
-        return self._src[item]
+        return np.asarray(self._src[item])  # avoids copy for PyTorch at least
 
 
 def jit(func=None, *, out=None, disable=False, **kwargs):  # noqa: C901

tests/ndarray/test_elementwise_funcs.py

@@ -136,7 +136,7 @@ def _test_binary_func_proxy(np_func, blosc_func, dtype, shape, chunkshape, xp):
         assert True
     if success:
         try:
-            result = blosc_func(not_blosc1, a_blosc2)[...]
+            result = blosc_func(not_blosc1, a_blosc2)[()]
             np.testing.assert_allclose(result, expected, rtol=1e-6, atol=1e-6)
         except TypeError as e:
             # some functions don't support certain dtypes and that's fine