Update distillability modeling scripts to predict long articles

heuristics/distillable/server.py

 #!/usr/bin/env python
 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import argparse
 import collections
 import cherrypy
 import json
 import os
@@ skipping 164 matching lines @@
       response = self.update(request['data'])
     return json.dumps({'response': response})
 
   def getLastUpdateId(self):
     return self.nextUpdateId - 1
 
 
 
 if __name__ == '__main__':
   parser = argparse.ArgumentParser()
-  parser.add_argument('--data-dir')
+  parser.add_argument('--data-dir', required=True)
   options = parser.parse_args()
   service = Service(options.data_dir)
   conf = {
     'global': {
       'server.socket_host': '0.0.0.0',
       'server.socket_port': 8081,
     },
     '/': {
       'tools.response_headers.on': True,
       'tools.response_headers.headers': [('Content-Type', 'text/plain')],
       'tools.staticdir.on': True,
       'tools.staticdir.dir': os.getcwd(),
       'tools.staticdir.index': 'index.html',
     },
     '/images': {
       'tools.staticdir.on': True,
       'tools.staticdir.dir': os.path.join(os.getcwd(), options.data_dir),
       'tools.expires.on': True,
       'tools.expires.secs': 60,
     }
   }
   cherrypy.quickstart(service, '', conf)