Run web.py python app with command line arguments that are not port number -

i need provide xml file command line argument web.py app. however, library automatically takes first command line argument port number, not provide argument. there sort of trick or workaround provide xml file command line argument?

#!/usr/bin/env python import web import sys import xml.etree.elementtree et  file = sys.argv[1]  urls = ('/get_user/(.*)', 'get_user',     '/users', 'list_users')  app = web.application(urls, globals())  def read_xml(xml_file):     open(xml_file, 'r') f:         tree = et.parse(f)     return tree.getroot()  root = read_xml(file)  class list_users:     def get(self):         output = 'users:\n'         child in root:             print 'child', child.tag, child.attrib             output += (str(child.attrib['user']) +             ': ' + str(child.attrib['name']) + ', ' + str(child.attrib['email'] + '\n'))         return output  class get_user:     def get(self, name):         child in root:             if child.attrib['name'] == name:                 output += str(child.attrib['name']) + ", " + str(child.attrib['email'])             return output         output = "the user (" + name + ") couldn't found!"         return output  if __name__ == "__main__":     app.run()