Replace and inserting strings within .txt files with the use of regex

[Νίκος]

D:\>convert.py
  File "D:\convert.py", line 34
SyntaxError: Non-ASCII character '\xce' in file D:\convert.py on line
34, but no
 encoding declared; see http://www.python.org/peps/pep-0263.html for
details

D:\>

What does it refering too? what character cannot be identified?

Line 34 is:

src_data = src_data.replace( '</body>', '<br><br><center><h4><font
color=green> Αριθμός Επισκεπτών: %(counter)d </body>' )

Also,

for currdir, files, dirs in os.walk('test'):

	for f in files:

		if f.lower().endswith("php"):

in the above lines

should i state  os.walk('test') or  os.walk('d:\test') ?