title: Python 3.6 Tensor Flow: Cannot import name 'nccl_ops'
body: <p>I am trying to test NVIDIA's <a href="https://github.com/NVlabs/stylegan/" rel="nofollow noreferrer">Style GAN</a> and am encountering an error when trying to run the <a href="https://github.com/NVlabs/stylegan/blob/master/pretrained_example.py" rel="nofollow noreferrer">pretrained_example.py</a> file. </p>
  
  <p>I get an import error from the line <code>from tensorflow.python.ops import nccl_ops</code></p>
  
  <blockquote>
    <p>ImportError: cannot import name 'nccl_ops'</p>
  </blockquote>
  
  <p>I think I installed all the prerequisites properly and am using python 3.6. It could be a mac tensorflow issue possibly because it doesn't mention OSX on the github project. Any help would be appreciated. It might be a matter of installing a different version of tensorflow or something else, I'm not sure. </p>