Baffled: Django “could not import app.views” but can import app, in WSGI?

问题

I'm having an odd Django problem, running Django with mod_wsgi.

Django is finding urls.py, and then saying:

ViewDoesNotExist: Could not import app.views. Error was: No module named views

Bizarrely, if I have

import app

in the import statements in urls.py I don't get an error (until it hits app.views as above), but if I have

from app import views

in my import statements, I get an error.

My python path, as shown in the Django debug info, has both the containing folder and the app folder on it. If I run Python from the command line, I can import app.views just fine. I can run the app using python manage.py runserver just fine.

I've tried printing the python path to stderr from urls.py too, and it has the path to app in it.

What could be going on?

My first thought was that there might not be an __init__.py in the app folder, but there is.

Thanks!

UPDATE

In the runserver app, if I try

print app.__file__
>> \path\to\app\__init__.py

But in the wsgi version, I only see:

print app.__file__
>> \path\to\app\

In other words, it's just not finding __init__.pyc.

回答1:

Probably a circular dependency - something in views is importing another module, which itself is trying to import views.

回答2:

Your web server is out of file handles. Reconfigure the WSGI app for daemon mode.

来源：https://stackoverflow.com/questions/5119964/baffled-django-could-not-import-app-views-but-can-import-app-in-wsgi