[Errno 13] Permission denied: '.cache' - where is the directory I need to change permission

I am now deploying my django project using apache mod_wsgi, after a lot effort, it is near the end. But now when I run my project directly, I am stuck with a permission issue, and got this error:

OSError at /

[Errno 13] Permission denied: '.cache'

Request Method:	GET
Request URL:	http://10.3.94.239/
Django Version:	1.4
Exception Type:	OSError
Exception Value:	[Errno 13] Permission denied: '.cache'
Exception Location:	/usr/lib/python2.6/os.py in makedirs, line 157
Python Executable:	/usr/bin/python

I believe this is because the cache can not be written, so natually,  I need to change its permission. But WHERE?

I don't know how to find out the directory.

Can you tell me anything about this?

Thanks very much in advance.

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