sxjscience commented on a change in pull request #18342:
URL: https://github.com/apache/incubator-mxnet/pull/18342#discussion_r426198333
##########
File path: tests/python/unittest/test_numpy_ndarray.py
##########
@@ -1327,3 +1327,26 @@ def test_np_ndarray_pickle():
a_load = pickle.load(f)
same(a.asnumpy(), a_load.asnumpy())
[email protected]('dtype', [np.float32, np.int32])
[email protected]('size', [
+ (3, 4, 5, 6),
+ (2, 10),
+ (15,),
+ ()
+])
+@use_np
+def test_dlpack(dtype, size):
+ a = mx.np.random.uniform(size=size)
+ a_np = a.copy()
+
+ pack = mx.npx.to_dlpack_for_read(a)
+ b = mx.npx.from_dlpack(pack)
+
+ a_copy = a.copy()
+ pack2 = mx.npx.to_dlpack_for_write(a_copy)
+ c = mx.npx.from_dlpack(pack2)
Review comment:
To put it together:
```python
a = mx.np.random.uniform(size=size)
a_np = a.copy()
a += 1
pack = mx.npx.to_dlpack_for_read(a)
b = mx.npx.from_dlpack(pack)
a_copy = a.copy()
pack2 = mx.npx.to_dlpack_for_write(a_copy)
c = mx.npx.from_dlpack(pack2)
c += 1
del a, pack, pack2
same(a_np + 1, b)
same(a_np + 2, c)
same(a_np + 2, a_copy)
```
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