xidulu edited a comment on issue #16829: [Numpy][Operator] 'where' 
Implementation in MXNet
URL: https://github.com/apache/incubator-mxnet/pull/16829#issuecomment-554435551
 
 
   Two question:
   1. Numpy supports the following usage:
   ```
   >>> import numpy as np
   >>> a = np.random.uniform(size=(4,1))
   >>> np.where(a > 0.5)
   (array([0, 1, 2]), array([0, 0, 0]))
   ```
   in short: x and y are optional ( either *both* or *neither* of x and y 
should be given)
   
   2. How did you handle the scalar case mentioned in the docstring?
   
   
https://github.com/apache/incubator-mxnet/pull/16829/files#diff-2867f3bd5e893c32c128044e32d821d6R7353-R7359
   

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