title: Python & Windows: Where is the python launcher?
body: <p>I'm trying to use different versions of <code>python</code> on <code>win7</code>, and I was told that I can use the <code>python laucher</code>. </p>
  
  <p>I find the docs for it: <a href="https://docs.python.org/3/using/windows.html#launcher" rel="noreferrer">https://docs.python.org/3/using/windows.html#launcher</a>
  But I don't know where is it. Someone say its called <code>py.exe</code>, but there is no file with this name on my computer.</p>
  
  <p>I installed python <code>3.4.3</code> with <code>Anaconda</code>, <a href="https://store.continuum.io/cshop/anaconda/" rel="noreferrer">https://store.continuum.io/cshop/anaconda/</a>, comes with <code>Scipy</code></p>
  
  <p>===========</p>
  
  <p>UPDATE:
  Since there is no <code>python launcer</code> in <code>Anacoda</code>, how can I re-install it? Or if there is better way of using different version on <code>Win7</code>?</p>