Restricted Access

[iapain]

I'm developing a webIDE for python and I've 2 questions regarding it.

1. How can i disable some of the modules without deleting. e.g I wish
to disable "os" module.
2. How can i force user code to access only his particular folder, I
dont want to create uses in unix, e.g

fp = open(PATH, 'w') # If this PATH is defined then use can access
files else he cant .. is there is any way?

Regards!
iapain