simple script to count classes defined in a python project

Any time you have a sizeable python project with many *.py source files, you can use this script to count how many classes defined.

import re, sys
from os import walk

printed={}
for (path, dirs, files) in walk("c:\\py") :
       for filename in files :
               if not re.search("\.py$",filename) : continue
               if not printed.has_key(path):
                       print " path = " + path
                       printed[path] = True

               for line in open (path+'\\'+filename) :
                       #if re.search('^\s*def ', line) : print line,
                       #if re.search('^\s*class\s', line) : print filename + ':\t' + line,
                       if re.search('^\s*try\s', line) : print filename + ':\t' + line,
                       #if re.search('@', line) : print filename + ':\t' + line,