[Tutor] Encoding error when reading text files in Python 3

[Dat Huynh]

Dear all,

I have written a simple application by Python to read data from text files.

Current I have both Python version 2.7.2 and Python 3.2.3 on my laptop.
I don't know why it does not run on Python version 3 while it runs
well on Python 2.

Could you please tell me how I can run it on python 3?
Following is my Python code.

 ------------------------------
   for subdir, dirs, files in os.walk(rootdir):

        for file in files:

            print("Processing [" +file +"]...\n" )

            f = open(rootdir+file, 'r')

            data = f.read()

            f.close()

            print(data)
------------------------------

This is the error message:

------------------------------
Traceback (most recent call last):

  File "/Users/dathuynh/Documents/workspace/PyTest/MyParser.py", line
53, in <module>

    main()

  File "/Users/dathuynh/Documents/workspace/PyTest/MyParser.py", line
20, in main

    data = f.read()

  File "/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/encodings/ascii.py",
line 26, in decode

    return codecs.ascii_decode(input, self.errors)[0]

UnicodeDecodeError: 'ascii' codec can't decode byte 0xd1 in position
4980: ordinal not in range(128)
------------------------------

Thank you very much for your help.

Sincerely,
Dat Huynh.