title: How to create a .py file for Google App Engine?
body: <p>I am just at the very start of what I think is gonna be a long journey exploring the world of applications in <a href="http://code.google.com/appengine/" rel="nofollow noreferrer">Google App Engine</a> using <a href="http://en.wikipedia.org/wiki/Python_(programming_language)" rel="nofollow noreferrer">Python</a>. </p>
  
  <p>I have just downloaded <a href="http://www.python.org/download/releases/2.6.4/python-2.6.4.msi" rel="nofollow noreferrer">Python 2.6.4</a> from <a href="http://www.python.org/download/releases/2.6.4/" rel="nofollow noreferrer">the Python official website</a> and installed it on my computer (I am using Windows XP). I also downloaded <a href="http://googleappengine.googlecode.com/files/GoogleAppEngine_1.2.8.msi" rel="nofollow noreferrer">the App Engine Python software development kit (SDK)</a> (from <a href="http://code.google.com/appengine/downloads.html" rel="nofollow noreferrer">this page</a>) and installed it, too. Both of these steps were suggested on <a href="http://code.google.com/appengine/docs/python/gettingstarted/devenvironment.html" rel="nofollow noreferrer">the second page of Google App Engine's Getting-Started Guide</a>. </p>
  
  <p>However, when I moved on to <a href="http://code.google.com/appengine/docs/python/gettingstarted/helloworld.html" rel="nofollow noreferrer">the third page, which is titled as "Hello, World!"</a>, I ran into a sort of complication. It is written there: </p>
  
  <blockquote>
    <p>"Create a directory named helloworld.
    All files for this application reside
    in this directory. Inside the
    helloworld directory, create a file
    named helloworld.py, and give it the
    following contents..."</p>
  </blockquote>
  
  <p>I am kind of puzzled here: How do I create a .py file? Is it like I need to create a notepad file (.txt) and name it helloworld.py (when I did so, it didn't change into any different file of any different, but rather stayed an ordinary .txt file) or should I somehow create that file using Google App Engine Launcher that I have installed?</p>