not sure, don't know how to get python to write a 0 without a null terminator or EOL or anything like that yet. docs.python.org FTW.
import os
# open a file for writing
f = os.open('/tmp/foobar', os.O_WRONLY)
# create a string with a single NULL byte
s = '\0'
# write the string f.write(s) # close the file f.close() -- John Dennis <jdennis redhat com>