AttributeError: module 'mxnet.contrib.symbol' has no attribute 'YoloOutput'

[Baozhang-Ren]

Got AttributeError: module 'mxnet.contrib.symbol' has no attribute 'YoloOutput' when trying to run the demo.

[DavoFranco]

I am having the same issue.....

[zhreshold]

same as #34

[vikash0837]

Even after building mxnet from source ,i am getting the same error.
AttributeError: module 'mxnet.contrib.symbol' has no attribute 'YoloOutput'

I followed the following link for building the mxnet from source.
http://mxnet.incubator.apache.org/install/index.html

[vikash0837]

Hi,
I looked into the file mxnet/python/mxnet/contrib/symbol.py
There is no function called YoloOutput. But demo.py is redirecting to
out = mx.contrib.symbol.YoloOutput(data=pred, num_class=num_classes,
num_anchor=num_anchor, object_grad_scale=5.0, background_grad_scale=1.0,
coord_grad_scale=1.0, class_grad_scale=1.0, anchors=anchors,
nms_topk=400, warmup_samples=12800, name='yolo_output')

I checked for 'YoloOutput' in dir(mx.contrib.symbol)
which returns False only.

[zhreshold]

@vikash0837 Checkout the latest master, I forgot to update darknet symbol file in the previous update
It should be called Yolo2Output

[vikash0837]

@zhreshold ,I rebuild with latest master. Still after building ,i am not getting the Yolo2Output function.
After build i tried
import mxnet as mx
'Yolo2Output' in dir(mx.contrib.symbol) which returns False only

[vikash0837]

@zhreshold apart from the existing error there is also a bug in your latest changes.
inside symbol/symbol_darknet19_yolo.py
from symbol.symbol_darknet19 import conv_act_layer, stack_neighbor
you can't import stack_neighbor from symbol_darknet19.py as stack_neighbor function is not present in symbol_darknet19 .py
it has to be imported from common.py

[zhreshold]

@vikash0837 By latest master I mean the submodule mxnet in master branch, not official incubator-mxnet. Maybe you are mixing different mxnet.
Try

python -c "import mxnet; print(mxnet)"

to see where it locates.
Anyways, thanks for spotting the errors.

[vikash0837]

@zhreshold Thanks for your prompt reply. I am using submodule mxnet from your git only.
Here is the link . You can correct me if i am wrong.
https://github.com/zhreshold/mxnet.git

I couldn't find the module Yolo2Output anywhere in that repository. It is not populating after build as well .
Response of <python -c "import mxnet; print(mxnet)">

<module 'mxnet' from '/home/ubuntu/yoloDemo/updated-yolo/mxnet/python/mxnet/init.pyc'>

[ssridhar2065]

@zhreshold, could you please tell me how to resolve this problem. I am still getting this error.
Am I missing something.