[GitHub] miteshyh edited a comment on issue #13751: There could be genuine duplicate output names?

[GitBox <gi...@apache.org>]

miteshyh edited a comment on issue #13751: There could be genuine duplicate output names? 
URL: https://github.com/apache/incubator-mxnet/issues/13751#issuecomment-451061506
 
 
   thanks @leleamol 
   
   It gets reproduced with default  PSPNET with ResNet50 backbone, I use it from GluonCV model zoo.
   
   Below is the minimum code to repro.
   
   ```
   import numpy as np
   from PIL import Image
   import mxnet as mx
   from mxnet import gluon, autograd, image
   import gluoncv
   from mxnet.gluon.data.vision import transforms
   
   ctx = mx.cpu()
   model = gluoncv.model_zoo.PSPNet(2, norm_layer=mx.gluon.contrib.nn.SyncBatchNorm, ctx=ctx,pretrained_base=False)
   
   transform_fn = transforms.Compose([
       transforms.ToTensor()])
   
   #use some (R,G,B) image in PNG format with dims 480 X 480
   img = Image.open('/path/to/some/image.png')
   img = transform_fn(mx.nd.array(img))
   img = img.expand_dims(0).as_in_context(mx.cpu())
   
   model.hybridize()
   # I do not use pretrained weights for some reason so initialize
   model.initialize(ctx=ctx)
   model(mx.nd.array(img))
   
   model_sym = model._cached_graph[1]
   
   sym_graph = model_sym.get_internals()
   
   for sym in sym_graph.get_children():
       print '=>',sym
   
   ```
   Below is the stack trace ( Line numbers may slightly differ due to some debug lines)
   ---------------------------------------------------------------------------
   ValueError                                Traceback (most recent call last)
   <ipython-input-5-67db4393f07b> in <module>()
        25 sym_graph = model_sym.get_internals()
        26 
   ---> 27 for sym in sym_graph.get_children():
        28     print '=>',sym
   
   /usr/local/lib/python2.7/dist-packages/mxnet/symbol/symbol.pyc in <genexpr>((i,))
        91         <Symbol _plus0>
        92         """
   ---> 93         return (self[i] for i in self.list_outputs())
        94 
        95     def __add__(self, other):
   
   /usr/local/lib/python2.7/dist-packages/mxnet/symbol/symbol.pyc in __getitem__(self, index)
   
   --> 523                         raise ValueError('There are multiple outputs with name \"%s\"' % index)
       524                     idx = i
       525             if idx is None:
   
   ValueError: There are multiple outputs with name "pspnet4_resnetv1s_pool0_fwd_output"
   
   **"pspnet4_resnetv1s_pool0_fwd_output" is fed to next block and skip connection.**
   
   

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