WoW (NPC Display ID)

#!/usr/bin/env python
 
import urllib2
import re
 
matcher = re.compile("displayId: ([0-9]+)")
 
def fetch_display_id (npc_id):
    url = "https://www.wowhead.com/npc=%s" % npc_id
 
    fs = urllib2.urlopen(url)
    data = fs.read()
    fs.close()
 
    return matcher.findall(data)[0]
 
with open("model_ids.txt") as m:
    model_input = m.readlines()
 
output = ""
 
for line in model_input:
    m_id = line.strip()
    m_display_id = fetch_display_id(m_id)
 
    output = output + "%s=%s\n" % (m_id, m_display_id)
 
    print "%s=%s" % (m_id, m_display_id)
 
with open("model_display_ids.txt", "w") as m:
    m.write(output)