Careful using relative paths in PYTHONPATH. If you share a file system with untrusted users (like /tmp or an NFS mount) or extract an untrusted archive (zip, t

Careful using relative paths in PYTHONPATH. If you share a file system with untrusted users (like /tmp or an NFS mount) or extract an untrusted archive (zip, tar, rar) then you might inadvertently execute python code that another user placed there! It's the same reason why you shouldn't use PATH=. in your shell. This poor man's virtualenv doesn't seem like a good idea...