import random


def make_marker(bits=64):
    """ Return a unique string that , for marking boundaries in text """
    #  i.e. '|-b1dda1c7f14cd89e-|'
    # In python2, hex() on big numbers gives i.e. '0x3333333333L'.
    # I'll drop the 1st two and last chars with [2:-1].
    return '|-'+hex(random.getrandbits(64))[2:-1]+'-|'