title: How to set python path in windows 7
body: <p>I try to set path of python in windows 7, but I can not do that. 
  I go to:</p>
  
  <pre><code> My Computer -&gt; Properties -&gt; Advanced &gt; Environment Variables
  </code></pre>
  
  <p>but I don't know what to do now.
  please help me</p>