OSQA site sorter

import re
import sys
import sys
import datetime

from urllib2 import urlopen

def file_len(fname):
    with open(fname) as f:
        for i, l in enumerate(f):
            pass
    return i + 1

input_file = 'c:\\tmp\\input.txt'
input_file_length = file_len(input_file)
f = open (input_file)
list = []

print "Fetching pages..."

for i, line in enumerate(f):
    sys.stdout.flush()
    line = line.strip()
    m = re.search('\* <(http://.*?)>(?: - )?(.*)', line)
    if (not m):
        print "Failed to match line '{}'".format(line)
    sys.exit()

    site = {}
    site['url'], site['description'] = m.group(1), m.group(2)
    print "{}/{} ({}) - Fetching data from {}".format(i+1, input_file_length, datetime.datetime.now(), site['url'])

    try:
        html = urlopen(site['url'], timeout = 5).read()
    except Exception as e:
        print "Problem fetching URL {}: {}".format(site['url'], e)
    continue

    m = re.search('<div class="questions-count">\s*(\d+)\s*<', html)
    if (not m):
    print "Failed to find question count for", site['url']
    continue

    site['questions'] = int(m.group(1))

    print "Found {} questions".format(site['questions'])
    list.append(site)

print
print "The sorted list:"
print

list.sort(key = lambda x:x['questions'])
list.reverse()
for site in list:
    print " * <{}>".format(site['url']) + (" - {}".format(site['description']) if site['description'] != "" else "")