Modify existing Python code

I have the code below which needs modification: I need the output file changing so it doesnt record the filenames of 0 finds: only the positive hits as listed. for info: the csv contains keywords, the script will search through a folder of files and record how many instances of each keyword appears and output to a text file. --- from os import walk; import os; import re; import sys if len([login to view URL]) != 2: print 'Please pass the path of the folder as command line argument.'; print 'Usage: ' + [login to view URL](__file__) + ' <folder>'; print 'Example: ' + [login to view URL](__file__) + ' /tmp'; [login to view URL](0); keywords_file = open('[login to view URL]', 'r+'); keywords_csv = [login to view URL](); [login to view URL](); keywords = [login to view URL](','); outfile = open('[login to view URL]', 'w'); for (dirpath, dirnames, filenames) in walk([login to view URL][1]): print '<<<' + dirpath + '>>>'; [login to view URL]('<<<' + dirpath + '>>>' + '\n'); for filename in filenames: # if [login to view URL]('.html') or [login to view URL]('.php'): print '[ ' + dirpath + '/' + filename + ' ]'; [login to view URL]('[ ' + dirpath + '/' + filename + ' ]' + '\n'); file = open(dirpath + '/' + filename); content = [login to view URL](); for keyword in keywords: list = [login to view URL](keyword, content); count = len(list); print keyword + ': ' + str(count); [login to view URL](keyword + ': ' + str(count) + '\n'); [login to view URL](); [login to view URL](); ---