title: Google App Engine on Python "ImportError: No module named google.appengine.ext"
body: <p>I am trying to set up a python source file for a Google Cloud.
  I have installed a GSUtil on my MAC OS 10.6 and set up the path for files as instructed on the page 
  adding this command (export PYTHONPATH=${PYTHONPATH}:$HOME/gsutil/boto:$HOME/gsutil) to .bash_profile under the home directory.</p>
  
  <p>Then, I ran the following code:</p>
  
  <pre><code>#!/usr/bin/python
  
  import StringIO
  import os
  import shutil
  import tempfile
  import time
  from oauth2_plugin import oauth2_plugin
  
  import boto
  
  # URI scheme for Google Cloud Storage.
  GOOGLE_STORAGE = 'gs'
  # URI scheme for accessing local files.
  LOCAL_FILE = 'file'
  </code></pre>
  
  <p>And, the compiler gave me an error saying </p>
  
  <pre><code>&gt;&gt;&gt; [evaluate gs.py]
  Traceback (most recent call last):
    File "/Volumes/WingIDE-101-4.0.0/WingIDE.app/Contents/MacOS/src/debug/tserver/_sandbox.py", line 8, in &lt;module&gt;
    File "/Users/lsangin/oauth2_plugin.py", line 18, in &lt;module&gt;
    File "/Users/lsangin/google_appengine/cloudauth/oauth2client/appengine.py", line 24, in &lt;module&gt;
      from google.appengine.ext import db
  ImportError: No module named google.appengine.ext
  &gt;&gt;&gt; from google.appengine.ext
  </code></pre>
  
  <p>Can someone help me with the issue?
  (Sorry, I am a newbie!)
  Thank you in advance.</p>