title: Error installing Jupyter & pywinpty (Python)
body: <p>I'm trying to install Jupyter on <strong>Python 3.7</strong> and seem to be stumbling over this error again and again;</p>
  
  <pre><code>winpty/cywinpty.c(598): fatal error C1083: Cannot open include file: 'winpty.h': No such file or directory
  error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio\\2017\\BuildTools\\VC\\Tools\\MSVC\\14.14.26428\\bin\\HostX86\\x86\\cl.exe' failed with exit status 2
  </code></pre>
  
  <p>I get the same error when attempting to install pywinpty via pip.</p>
  
  <p>I have installed &amp; reinstalled the build tools to no avail and the command window   is elevated - any ideas?</p>
  
  <p>UPDATE: Not quite resolved in 3.7 - but <strong>it worked fine in 3.6</strong>, I've rolled back.</p>