Python 3 код перенести на Python 2

#!/usr/bin/python3

 Traceback (most recent call last):
  File "python.py", line 3, in <module>
    prefix_data = {l.split()[-1] : l.strip() for l in open('codes.txt')}
  File "python.py", line 3, in <dictcomp>
    prefix_data = {l.split()[-1] : l.strip() for l in open('codes.txt')}
IndexError: list index out of range

#!/usr/bin/python
from __future__ import absolute_import
import marisa_trie
from io import open
prefix_data = dict((l.split()[-1], l.strip()) for l in open(u'codes.txt'))
trie = marisa_trie.Trie(prefix_data.keys())
def get_descr(phone):
    phone_prefixes = trie.prefixes(phone)
    pref = max(phone_prefixes, key=len)
    if pref == None: return u"Unknown " + phone
    return prefix_data[pref]
cur_descr = None
prev_descr = None

output = open(u'final', u'w')

for line in open(u'number', u'r'):
    cur_descr = get_descr(line)
    if cur_descr != prev_descr:
        output.write(cur_descr)
        output.write(u'\n')
        prev_descr = cur_descr
    output.write(line)

output.flush()