mod-wsgi & apache & pyramid (pylonsproject)

i have a problem with running pyramid site under apache+mod-wsgi. the problem is that i can't tell apache which python interpretor is the right one for the site it serve. i have several virtual environments and i would like to take those python interpretors.

i added this code to my apache config:

WSGIApplicationGroup %{GLOBAL}
WSGIPassAuthorization On
WSGIDaemonProcess pyramid user=karantan group=karantan processes=1 threads=4 python-    path=开发者_JAVA百科/home/karantan/pyramid1.0/bin/python
WSGIScriptAlias /myapp /home/karantan/myproject/pyramid.wsgi

<Directory /home/karantan/myproject>
  WSGIProcessGroup pyramid
  Order allow,deny
  Allow from all
</Directory>

there is also a parameter called WSGIPythonHome that tells apache which interpretor is the right one but i can't put it in this config because it is global variable (or something like that...)

so how do i run pyramid site with virtual environment under apache?

as stated above my main problem (i think) is that apache always runs pyramid with default system python interpretor (/usr/bin/python). how do i tell apache that it must take the one from the virtualenv.???

Documentation explaining how to use virtual environments with mod_wsgi can be found at:

http://code.google.com/p/modwsgi/wiki/VirtualEnvironments