def vorf_str_to_set(vorf):
    """
    Convert a Vorf string into a Python set with the Vorf values in it,
    appropriately quoted.
    """
    bits = [x.strip() for x in vorf.split(',')]
    bits_str = ["'{}'".format(x) for x in bits]
    return "{%s}" % ', '.join(bits_str)