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Posted to commits@mxnet.apache.org by GitBox <gi...@apache.org> on 2020/07/10 04:06:02 UTC

[GitHub] [incubator-mxnet] leezu opened a new issue #18685: mx.symbol.numpy._Symbol.__deepcopy__ logic error

leezu opened a new issue #18685:
URL: https://github.com/apache/incubator-mxnet/issues/18685


   `mx.symbol.numpy._Symbol.__deepcopy__` performs shallow copy instead of deep copy like `mx.symbol.Symbol.__deepcopy__ `.
   
   Problem:
   ```
   [ins] In [1]: import mxnet as mx
   
   [ins] In [2]: import copy
   
   [ins] In [3]: v = mx.sym.Variable('a').as_np_ndarray()
   
   [ins] In [4]: b = copy.copy(v)
   
   [ins] In [5]: b._set_attr(name='b')
   
   [ins] In [6]: v
   Out[6]: <_Symbol b>
   
   [ins] In [7]: b
   Out[7]: <_Symbol b>
   ```
   
   
   Expected:
   ```
   [ins] In [1]: import mxnet as mx
   
   [ins] In [2]: import copy
   
   [ins] In [3]: v = mx.sym.Variable('a').as_np_ndarray()
   
   [ins] In [4]: b = copy.copy(v)
   
   [ins] In [5]: b._set_attr(name='b')
   
   [ins] In [6]: v
   Out[6]: <_Symbol a>
   
   [ins] In [7]: b
   Out[7]: <_Symbol b>
   ```
   


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[GitHub] [incubator-mxnet] wkcn commented on issue #18685: mx.symbol.numpy._Symbol.__deepcopy__ logic error

Posted by GitBox <gi...@apache.org>.
wkcn commented on issue #18685:
URL: https://github.com/apache/incubator-mxnet/issues/18685#issuecomment-656511012


   Agree the expected result, which is consistent with `mx.nd`:
   ```python
   import mxnet as mx
   import copy
   
   v = mx.nd.array([1,2,3]).as_np_ndarray()
   b = copy.copy(v)
   b[0] = 10
   print(b) # [10. 2. 3.]
   print(v) # [1. 2. 3.]
   ```


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[GitHub] [incubator-mxnet] szha closed issue #18685: mx.symbol.numpy._Symbol.__deepcopy__ logic error

Posted by GitBox <gi...@apache.org>.
szha closed issue #18685:
URL: https://github.com/apache/incubator-mxnet/issues/18685


   


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