title: ModuleNotFoundError: No module named 'connections'
body: <p>I am using pybrain library. When I import</p>
  <pre><code>from pybrain.structure import SigmoidLayer
  </code></pre>
  <p>I get the error</p>
  <pre><code>ModuleNotFoundError: No module named 'connections'
  </code></pre>
  <p>I am quite confused about the installation of pybrain. I am using python 3.6 and windows 10.</p>