remove_null_characters.py

import os, subprocess

# Remove null characters.
# http://gnuwin32.sourceforge.net/packages/coreutils.htm
file = "your_file_here"

command = ["C:\\Program Files (x86)\\GnuWin32\\bin\\tr.exe",
           "-d \'\\000\'"]

with open(file, "r") as original, open(file + ".new", "w", encoding="utf-8") as modified:
    subprocess.Popen(" ".join(command), stdin=original, stdout=modified).wait()

os.remove(file)
os.rename(file + '.new', file)