[Tutor] Newbie: Help on comparing files

[Isr Gish]

Danny Yoo wrote:

   >However, there's still a module in the Standard Library that should be
   >very appropriate to Isr's question: the 'sets' module:
   >
   >    http://www.python.org/doc/lib/module-sets.html
   >
   >
   >###
   >>>> from sets import Set
   >>>> t1 = 'a b c d'
   >>>> t2 = 'c b d e'
   >>>> s1 = Set(t1.split())
   >>>> s2 = Set(t2.split())
   >>>> s1
   >Set(['a', 'c', 'b', 'd'])
   >>>> s2
   >Set(['c', 'b', 'e', 'd'])
   >>>> s1 - s2
   >Set(['a'])
   >>>> s2 - s1
   >Set(['e'])
   >###
   >
I tried it and it works great. But its not good for what I want. Because I want the return should be in the same order its in the file.
IOW if the first element of file1 is not in file2, then I want it to be the first thing in the output file. And sets don't keep it in the same order that they where before.

Thanks Again
Isr