title: torchvision and tensorflow-gpu import error
body: <p>Running this:</p>
  <pre><code>import torchvision
  import tensorflow
  </code></pre>
  <p>Produces the error:</p>
  <blockquote>
  <p>SystemError: google/protobuf/pyext/descriptor.cc:354: bad argument to internal function</p>
  </blockquote>
  <p>However, swapping the order of the imports does not cause the error:</p>
  <pre><code>import tensorflow
  import torchvision
  </code></pre>
  <p>Why is this happening?</p>
  <hr />
  <p>Version info:</p>
  <pre><code>tensorflow-gpu=1.15.0
  torchvision==0.5.0
  </code></pre>