BOTTLE elementary questions

I've got Bottle working from my domain on the Web, using listening-on-port. The program is trivial, it just prints out a "not ready yet" message:

from bottle import route, run
@route('/')
def application():
    return 'Not ready yet'
run(port=51874)

Two issues:

(1) If I run the program with: python3.1 notready.py& it works fine, and returns control to my ssh session. But when I close my netbook or otherwise stop the session, the server stops. What's a good way to handle this?

(2) I also imported CherryPyServer, and changed the 'run' command to run(port=51874, server=CherryPyServer). It gives the following error. What should I do instead?

[replicounts@web214 htdocs]$ python3.1 notready.py
Bottle server starting up (using CherryPyServer())...
Listening on http://127.0.0.1:51874/
Use Ctrl-C to quit.

Traceback (most recent call last):
  File "notready.py", line 7, in <module>
    run(port=51874, server=CherryPyServer)
  File "/home/replicounts/webapps/repc/htdocs/bottle.py", line 2302, in run
    server.run(app)
  File "/home/replicounts/webapps/repc/htdocs/bottle.py", line 2037, in run
    from cherrypy import wsgiserver
ImportError: No module named cherrypy
[replicounts@web214 htdocs]$