Regex not matching a string

[python.prog29 at gmail.com]

Hi All -


In the following code ,am trying to remove a multi line - comment that contains "This is a test comment" for some reason the regex is not matching.. can anyone provide inputs on why it is so?

import os
import sys
import re
import fnmatch

def find_and_remove(haystack, needle):
    pattern = re.compile(r'/\*.*?'+ needle + '.*?\*/', re.DOTALL)
    return re.sub(pattern, "", haystack)

for path,dirs,files in os.walk(sys.argv[1]):
    for fname in files:
        for pat in ['*.cpp','*.c','*.h','*.txt']:
            if fnmatch.fnmatch(fname,pat):
                fullname = os.path.join(path,fname)
                # put all the text into f and read and replace...
                f = open(fullname).read()
                result = find_and_remove(f, r"This is a test comment") 
                print result