How to start Bottle as a daemon from another scrip

I would like to use BottlePy as a daemon started from another script and I have issues turning a standalone script (webserver.py) into a class. The standalone version of my webserver below works fine:

import bottle

@bottle.get('/hello')
def hello():
    return 'Hello World'

@bottle.error(404)
def error404(error):
    return 'error 404'

bottle.run(host='localhost', port=8080)

My intent is now to start it from the main script below as

from webserver import WebServer
from multiprocessing import Process

def start_web_server():
    # initialize the webserver class
    WebServer()

# mainscript.py operations
p = Process(target=start_web_server)
p.daemon = True
p.start()
# more operations

where WebServer() would be in the naively now-modified webserver.py:

import bottle

class WebServer():
    def __init__(self):
        bottle.run(host='localhost', port=8080)

    @bottle.get('/hello')
    def hello(self):
        return 'Hello World'

    @bottle.error(404)
    def error404(self, error):
        return 'error 404'

What works: the whole thing starts and the webserver is listening

What does not work: upon calling http://localhost:8080/hello

127.0.0.1 - - [11/Dec/2013 10:16:23] "GET /hello HTTP/1.1" 500 746
Traceback (most recent call last):
  File "C:\Python27\lib\site-packages\bottle.py", line 764, in _handle
    return route.call(**args)
  File "C:\Python27\lib\site-packages\bottle.py", line 1575, in wrapper
    rv = callback(*a, **ka)
TypeError: hello() takes exactly 1 argument (0 given)

My questions are:

what kind of parameters am I expected to pass to hello() and error404()?
what should I do in order to parametrize @bottle.get('/hello')? I would like to have something like @bottle.get(hello_url) but where should hello_url = '/hello' be initialized? (self.hello_url is unknown to @bottle.get)

EDIT: while preparing a fork of this question to handle question 2 (about the parametrization) I had an epiphany and tried the obvious solution which works (code below). I am not that used to classes yet so I did not have the reflex to add the variable in the scope of the class.

# new code with the path as a parameter
class WebServer():

    myurl = '/hello'

    def __init__(self):
        bottle.run(host='localhost', port=8080, debug=True)

    @bottle.get(myurl)
    def hello():
        return 'Hello World'

    @bottle.error(404)
    def error404(error):
        return 'error 404'

what kind of parameters am I expected to pass to hello() and error404()?

The short answer: none. Just remove self and they should start to work.

@bottle.get('/hello')
def hello():
    return 'Hello World'

@bottle.error(404)
def error404(error):
    return 'error 404'

what should I do in order to parametrize @bottle.get('/hello')? I would like to have something like @bottle.get(hello_url) but where should hello_url = '/hello' be initialized? (self.hello_url is unknown to @bottle.get)

I can interpret this a couple of different ways, so I'm not sure how to help you. But since this is a completely separate question (with potentially a much larger scope), please consider asking it in a new, separate SO question.