title: ERROR: Package 'object-detection' requires a different Python: 2.7.12 not in '>3.6'
body: <p>I am trying to install tensorflow-object-detection API.  Installed Tensorflow-gpu-2.1.0   already  with  pip.</p>
  <pre><code>sudo python -m pip install --use-feature=2020-resolver tensorflow-gpu
  </code></pre>
  <p>But when trying to install tensorflow-object-detection-api I am getting this error :  ERROR: Package 'object-detection' requires a different Python: 2.7.12 not in '&gt;3.6'</p>
  <p>Same with python3 :   ERROR: Package 'object-detection' requires a different Python: 3.5.2 not in '&gt;3.6'</p>
  <p>The error is shown when running the following command in the installation step :</p>
  <pre><code>python -m pip install --use-feature=2020-resolver .
  </code></pre>
  <p>O.S  :  Ubuntu 16.04</p>
  <p>Python: 2.7.12</p>