Flask+Nginx+uWSGI : ImportError: No module named site

Question

I installed as the http://www.reinbach.com/uwsgi-nginx-flask-virtualenv-mac-os-x.html link's tutorial and when executing the command uwsgi --ini deploy/deploy.ini, the terminal says there was an import error:

Set PYTHONHOME to /virtualenv/sample/

ImportError: No module named site

I have set my PYTHONHOME and PYTHONPATH as

export PYTHONPATH=$PYTHONPATH:/Library/Python/2.7/site-packages
export PYTHONHOME=$PYTHONHOME:/Library/Python/2.7

I cannot figure out what wrong with it.

Could someone help me with the problem?

The whole info in the terminal is shown as below if it is helpful:

(env)ios-devmatoMacBook-Pro:hello ios_dev$ uwsgi --ini deploy/deploy.ini
[uWSGI] getting INI configuration from deploy/deploy.ini
*** Starting uWSGI 1.9.10 (64bit) on [Fri May 17 16:42:22 2013] ***
compiled with version: 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00) on 17 May 2013 12:41:07
os: Darwin-11.4.2 Darwin Kernel Version 11.4.2: Thu Aug 23 16:25:48 PDT 2012; root:xnu-
1699.32.7~1/RELEASE_X86_64
nodename: ios-devmatoMacBook-Pro.local
machine: x86_64
clock source: unix
detected number of CPU cores: 4
current working directory: /Users/ios_dev/Desktop/sample/hello
detected binary path: /Users/ios_dev/Documents/little/little-web/little_web_dev/env/bin/uwsgi
your processes number limit is 709
your memory page size is 4096 bytes
detected max file descriptor number: 256
lock engine: OSX spinlocks
uwsgi socket 0 bound to TCP address 127.0.0.1:3031 fd 3
Python version: 2.7.1 (r271:86832, Jun 16 2011, 16:59:05)  [GCC 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2335.15.00)]

Set PYTHONHOME to /virtualenv/sample/

ImportError: No module named site

Solution

I read a lot of document about the question, but get no answer.

By coincidentally, I fix this problem by edit uid and gid as root.

It seem like a permissions problem. I don't know why, but it just work. Remember, it is very unsafe to run a product environment as root.

Comments

[Matthew Mitchell]

You cannot import a module without the correct permissions. To fix this problem use chown -R user:group /path/to/env so that the correct owner and group are set for the environment, and set the permissions as appropriate.