[Chicago] IndexError:index out of range

[=?gb2312?q?=B7=C5=DC=F8=20=CC=B8?=]

and i try to get this piece of code works,but receive a indexerror:
  thanks if anyone can be helpfull.
  regards,
  jolley
  http://www.onlamp.com/pub/a/python/2005/09/01/debugger.html?page=4
  or code here:
  #!/usr/bin/env python
  import pdb
import string
import sys
  class ConvertToDict:
    def __init__(self):
        self.tmp_dict = {}
        self.return_dict = {}
    def walk_string(self, some_string):
        '''walk given text string and return a dictionary. 
        Maintain state in instance attributes in case we hit an exception'''
        l = string.split(some_string)
        for i in range(len(l)):
            key = str(i)
            self.tmp_dict[key] = int(l[i])
        return_dict = self.tmp_dict
        self.return_dict = self.tmp_dict
        self.reset()
        return return_dict
    def reset(self):
        '''clean up'''
        self.tmp_dict = {}
        self.return_dict = {}
    def get_number_dict(self, some_string):
        '''do super duper exception handling here'''
        try:
            return self.walk_string(some_string)
        except:
   #if we hit an exception, we can rely on tmp_dict 
   #being a backup to the point of the exception
            return self.tmp_dict
  def main():
    ctd = ConvertToDict()
    try:
        for line in file(sys.argv[1]):
            line = line.strip()
            print "*" * 40
            print "line>>", line
            print ctd.get_number_dict(line)
            print "*" * 40
    except IndexError, e:
            print e
    
if __name__ == "__main__":
    #pdb.runcall(main)
    main()


 		
---------------------------------
 ÑÅ»¢Ãâ·ÑÓÊÏä-3.5GÈÝÁ¿£¬20M¸½¼þ
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mail.python.org/pipermail/chicago/attachments/20061016/eb9c35f7/attachment.html