def yes_no(message):
    """ Simple prompt parser"""
    yes = set(['yes', 'ye', 'y', ''])
    no = set(['no', 'n'])
    print(message)
    while True:
        answer = input('Would you like to continue? [y/n] ').lower()
        if answer in yes:
            return True
        elif answer in no:
            return False
        else:
            print('Please answer "Yes" or "No"')
