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PO(Another) ImportError with Flask under mod_wsgi
 

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  1. PO(Another) ImportError with Flask under mod_wsgi
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    <p>Sorry if this seems like a repeat of several previous questions, but none of those have helped me so far :-/</p> <p>I have written a Flask app that I am attempting to deploy under mod_wsgi and apache2.</p> <p>I get the following <code>ImportError</code>:</p> <pre><code>[Tue Apr 23 23:46:56 2013] [info] Server built: Dec 9 2012 18:57:18 [Tue Apr 23 23:46:56 2013] [info] mod_wsgi (pid=7445): Initializing Python. [Tue Apr 23 23:46:56 2013] [info] mod_wsgi (pid=7445): Attach interpreter ''. [Tue Apr 23 23:47:10 2013] [info] [client 127.0.0.1] mod_wsgi (pid=7443, process='foo.com', application=''): Loading WSGI script '/Users/admin/Sites/p4p/p4p_jsapp/pfp/pfp.wsgi'. [Tue Apr 23 23:47:10 2013] [error] [client 127.0.0.1] mod_wsgi (pid=7443): Target WSGI script '/Users/admin/Sites/p4p/p4p_jsapp/pfp/pfp.wsgi' cannot be loaded as Python module. [Tue Apr 23 23:47:10 2013] [error] [client 127.0.0.1] mod_wsgi (pid=7443): Exception occurred processing WSGI script '/Users/admin/Sites/p4p/p4p_jsapp/pfp/pfp.wsgi'. [Tue Apr 23 23:47:10 2013] [error] [client 127.0.0.1] Traceback (most recent call last): [Tue Apr 23 23:47:10 2013] [error] [client 127.0.0.1] File "/Users/admin/Sites/p4p/p4p_jsapp/pfp/pfp.wsgi", line 7, in &lt;module&gt; [Tue Apr 23 23:47:10 2013] [error] [client 127.0.0.1] from PfpServer import app as application [Tue Apr 23 23:47:10 2013] [error] [client 127.0.0.1] File "/Users/admin/Sites/p4p/p4p_jsapp/pfp/PfpServer.py", line 4, in &lt;module&gt; [Tue Apr 23 23:47:10 2013] [error] [client 127.0.0.1] import pandas as pd [Tue Apr 23 23:47:10 2013] [error] [client 127.0.0.1] ImportError: No module named pandas </code></pre> <p>Apache conf:</p> <pre><code>&lt;VirtualHost *:80&gt; ServerName www.foo.com ServerAlias foo.com DocumentRoot /Users/admin/Sites/p4p/p4p_jsapp/www &lt;Directory /Users/admin/Sites/p4p/p4p_jsapp/www&gt; Order allow,deny Allow from all &lt;/Directory&gt; WSGIDaemonProcess foo.com user=admin processes=2 threads=15 display-name=%{GROUP} WSGIProcessGroup foo.com WSGIScriptAlias / /Users/admin/Sites/p4p/p4p_jsapp/pfp/pfp.wsgi &lt;Directory /Users/admin/Sites/p4p/p4p_jsapp/pfp&gt; WSGIProcessGroup foo.com WSGIApplicationGroup %{GLOBAL} Order allow,deny Allow from all &lt;/Directory&gt; &lt;/VirtualHost&gt; </code></pre> <p>pfp.wsgi:</p> <pre><code>import sys activate_this = '/Users/admin/Sites/p4p/p4p_jsapp/foo/bin/activate_this.py' execfile(activate_this, dict(__file__=activate_this)) sys.path.append('/Users/admin/Sites/p4p/p4p_jsapp/pfp') from PfpServer import app as application </code></pre> <p>PfPServer.py:</p> <pre><code>import numpy as np import pandas as pd import ujson from flask import Flask, Response, request, render_template import traceback app = Flask(__name__) # ... </code></pre> <p>I have tried using with and without virtualenv to see if that would help, but I get the same error regardless. What's the problem here?</p> <p>edit: just to make it totally clear, I have pandas installed and the app runs fine locally in the debugger </p> <p>edit2: ok, the solution was in sys.path - I have installed the latest RC of pandas, which is on a non-standard path, and that's why it didn't work when I simply added the std site-packages path alone:</p> <pre><code>sys.path.append('/Users/admin/dev/pandas/pandas-0.11.0rc1') sys.path.append('/Library/Frameworks/EPD64.framework/Versions/7.3/lib/python2.7/site-packages') </code></pre> <p>...works - thanks to all!</p>
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    1. COwhere did you install pandas? is that directory in `sys.path`?
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    2. CODetermine what Python installation and version you are using from command line Python and do the same for under mod_wsgi. http://code.google.com/p/modwsgi/wiki/CheckingYourInstallation#Python_Installation_In_Use Then in for WSGI application, print out the value of 'pd.__file__' when run from command line. Edit you question and provide the results.
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      1. USGraham Dumpleton
 

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