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Posted to issues@mxnet.apache.org by GitBox <gi...@apache.org> on 2020/09/17 18:50:45 UTC
[GitHub] [incubator-mxnet] leezu opened a new issue #19170: Indexing memory sharing discrepancy
leezu opened a new issue #19170:
URL: https://github.com/apache/incubator-mxnet/issues/19170
## Description
MXNet array indexing will only match numpy memory sharing in a few cases.
## To Reproduce
Simple slice; mxnet matches numpy
``` python
a = mx.np.ones((10,))
b = a[:5]
a[:] = 0
print(a, b) # [0. 0. 0. 0. 0. 0. 0. 0. 0. 0.] [0. 0. 0. 0. 0.]
```
Slice with step; mxnet diverges
``` python
a = mx.np.ones((10,))
b = a[:5:2]
a[:] = 0
print(a, b) # [0. 0. 0. 0. 0. 0. 0. 0. 0. 0.] [1. 1. 1.]
```
as numpy still shares memory between the arrays:
``` python
a = np.ones((10,))
b = a[:5:2]
a[:] = 0
print(a, b) # [0. 0. 0. 0. 0. 0. 0. 0. 0. 0.] [0. 0. 0.]
```
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[GitHub] [incubator-mxnet] szha commented on issue #19170: Indexing memory sharing discrepancy
Posted by GitBox <gi...@apache.org>.
szha commented on issue #19170:
URL: https://github.com/apache/incubator-mxnet/issues/19170#issuecomment-694438980
the new python api standard includes read-only views
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