Find all files in filetree that have null signatures

filewalker.py

#!/usr/bin/python2

# Import the os module, for the os.walk function
import os
 
# Set the directory you want to start from
rootDir = '/cygdrive/d/Tank/Shares'

for dirName, subdirList, fileList in os.walk(rootDir):
    for fname in fileList:
        with open('%s/%s' % (dirName,fname), "rb") as f:
            if f.read(8) == '\x00\x00\x00\x00\x00\x00\x00\x00':
                mytime = datetime.datetime.fromtimestamp(os.path.getmtime('%s/%s' % (dirName,fname))).strftime('%Y-%m-%d:%H:%M')
                print('%s\t%s/%s' % (mytime,dirName,fname))