carlos-wong

def query_yes_no(question, default="yes"):
    """Ask a yes/no question via raw_input() and return their answer.
 
    "question" is a string that is presented to the user.
    "default" is the presumed answer if the user just hits <Enter>.
    It must be "yes" (the default), "no" or None (meaning
    an answer is required of the user).
 
    The "answer" return value is one of "yes" or "no".
    """