tqchen commented on a change in pull request #12047: [MXNET-779]Add DLPack 
Transformation API
URL: https://github.com/apache/incubator-mxnet/pull/12047#discussion_r209027699
 
 

 ##########
 File path: python/mxnet/_ctypes/ndarray.py
 ##########
 @@ -31,21 +31,24 @@
 
 class NDArrayBase(object):
     """Base data structure for ndarray"""
-    __slots__ = ["handle", "writable"]
+    __slots__ = ["handle", "writable", "dlpack"]
     # pylint: disable= no-member
 
-    def __init__(self, handle, writable=True):
+    def __init__(self, handle, writable=True, dlpack=None):
 
 Review comment:
   A better way is to keep NDArray's shared_ptr inside the manager_ctx itself, 
you can take a look at TVM's NDArray to DLManagedTesnor impl

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