Problemas na instalação do mod_python

<Directory "/var/www/py_script">
SetHandler mod_python
PythonHandler mptest
PythonDebug On
</Directory>

#!/usr/bin/python

from mod_python import apache

def handler(req):
req.content_type = 'text/plain'
req.write("Hello World!")
return apache.OK

MOD_PYTHON ERROR

ProcessId: 1724
Interpreter: '127.0.1.1'

ServerName: '127.0.1.1'
DocumentRoot: '/var/www'

URI: '/py_script/'
Location: None
Directory: '/var/www/py_script/'
Filename: '/var/www/py_script/'
PathInfo: ''

Phase: 'PythonHandler'
Handler: 'mptest'

Traceback (most recent call last):

File "/usr/lib/python2.7/dist-packages/mod_python/importer.py", line 1537, in HandlerDispatch
default=default_handler, arg=req, silent=hlist.silent)

File "/usr/lib/python2.7/dist-packages/mod_python/importer.py", line 1202, in _process_target
module = import_module(module_name, path=path)

File "/usr/lib/python2.7/dist-packages/mod_python/importer.py", line 304, in import_module
return __import__(module_name, {}, {}, ['*'])

ImportError: No module named mptest