import os, glob, mmap, sys

# replace all "kziaia" strings in file to "Kziaia"

pattern = "kziaia"

fp = open(sys.argv[1], 'r+')
mm = mmap.mmap(fp.fileno(), os.stat(fp.name).st_size)

addr = 0
while addr != -1:
  addr = mm.find(pattern, addr)
  if addr != -1:
    print "patching at addr=", addr
    mm[addr] = "K"

mm.close()
fp.close()