title: Why is 'import simplejson' failing in Python 2.7.3 code, but not in the interpreter?
body: <p>There are two instances running uwgsi and nginx servers.  Each hosts a Flask application.  Both are running on a Python 2.7.3 path. One of the servers throws an ImportError for the "import simplejson" statement.  The interpreter on both servers will accept this import statement without complaint.</p>
  
  <p>Here's the source of application A:</p>
  
  <pre><code>  1 from flask import Flask, request, session, g, redirect, url_for, abort, render_template, flash, views                                                                                                   
    2 import sys
    3 print sys.version
    4 print sys.path
    5 
    6 import os
    7 import functools
    8 import urllib,urllib2
    9 import simplejson
   10 from datetime import datetime, timedelta
  </code></pre>
  
  <p>And the source of application B:</p>
  
  <pre><code>  1 from flask import Flask, request, session, g, redirect, url_for, abort, render_template, flash, views                                                                                                   
    2 
    3 import sys
    4 print sys.version          
    5 print sys.path             
    6 
    7 import simplejson  
    8 
    9 import functools
  </code></pre>
  
  <p>Here's the sys.version and sys.path log output of server A:</p>
  
  <pre><code>2.7.3 (default, Aug  1 2012, 05:25:23) 
  [GCC 4.6.3]
  ['/srv/www/A/env/local/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg',     
  '/srv/www/A/env/local/lib/python2.7/site-packages/pip-1.2.1-py2.7.egg',
  '/srv/www/A/env/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg', 
  '/srv/www/A/env/lib/python2.7/site-packages/pip-1.2.1-py2.7.egg', 
  '/srv/www/A/env/lib/python2.7', 
  '/srv/www/A/20120910/src', 
  '/usr/lib/python2.7', 
  '/usr/lib/python2.7/plat-linux2', 
  '/usr/lib/python2.7/lib-tk', 
  '/usr/lib/python2.7/lib-old', 
  '/usr/lib/python2.7/lib-dynload', 
  '/srv/www/A/env/local/lib/python2.7/site-packages', 
  '/srv/www/A/env/lib/python2.7/site-packages']
  WSGI app 0 (mountpoint='notimportant.com|') ready in 1 seconds on interpreter 0x1b20420 pid: 11069
  </code></pre>
  
  <p>Here's the sys.version and sys.path log output of server B:</p>
  
  <pre><code>2.7.3 (default, Aug  1 2012, 05:25:23) 
  [GCC 4.6.3]
  ['/srv/www/B/env/local/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg', 
  '/srv/www/B/env/local/lib/python2.7/site-packages/pip-1.2.1-py2.7.egg', 
  '/srv/www/B/env/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg', 
  '/srv/www/B/env/lib/python2.7/site-packages/pip-1.2.1-py2.7.egg', 
  '/srv/www/B/env/lib/python2.7', 
  '/srv/www/B/20130105/src', 
  '/usr/lib/python2.7', 
  '/usr/lib/python2.7/plat-linux2', 
  '/usr/lib/python2.7/lib-tk', 
  '/usr/lib/python2.7/lib-old', 
  '/usr/lib/python2.7/lib-dynload', 
  '/srv/www/B/env/local/lib/python2.7/site-packages', 
  '/srv/www/B/env/lib/python2.7/site-packages']
  
  Traceback (most recent call last):
    File "/srv/www/B/20130105/src/B.py", line 7, in &lt;module&gt;
      import simplejson
  ImportError: No module named simplejson
  unable to load app 0 (mountpoint='notimportant.com|') (callable not found or import error)
  </code></pre>
  
  <p>Any constructive ideas will be appreciated.</p>