title: Install PyTorch from requirements.txt
body: <p>Torch documentation says use</p>
  <pre><code>pip install torch==1.4.0+cpu torchvision==0.5.0+cpu -f https://download.pytorch.org/whl/torch_stable.html
  </code></pre>
  <p>to install the latest version of PyTorch. This works when I do it manually but when I add it to req.txt and do <code>pip install -r req.txt</code>, it fails and says  <code>ERROR: No matching distribution</code>.</p>
  <p>Edit: adding the whole line from req.txt and error here.</p>
  <pre><code>torch==1.4.0+cpu -f https://download.pytorch.org/whl/torch_stable.html
  
  torchvision==0.5.0+cpu -f https://download.pytorch.org/whl/torch_stable.htmltorch==1.4.0+cpu
  </code></pre>
  <pre><code>ERROR: Could not find a version that satisfies the requirement torch==1.4.0+cpu (from -r requirements.txt (line 1)) (from versions: 0.1.2, 0.1.2.post1, 0.1.2.post2, 0.3.1, 0.4.0, 0.4.1, 1.0.0, 1.0.1, 1.0.1.post2, 1.1.0, 1.2.0, 1.3.0, 1.3.1, 1.4.0)
  ERROR: No matching distribution found for torch==1.4.0+cpu (from -r requirements.txt (line 1))
  </code></pre>