def query_yes_no_quit(question, default="yes"): """Ask a yes/no/quit 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 . It must be "yes" (the default), "no", "quit" or None (meaning an answer is required of the user). The "answer" return value is one of "yes", "no" or "quit". """ valid = {"yes":"yes", "y":"yes", "ye":"yes", "no":"no", "n":"no", "quit":"quit", "qui":"quit", "qu":"quit", "q":"quit"} if default == None: prompt = " [y/n/q] " elif default == "yes": prompt = " [Y/n/q] " elif default == "no": prompt = " [y/N/q] " elif default == "quit": prompt = " [y/n/Q] " else: raise ValueError("invalid default answer: '%s'" % default) while 1: sys.stdout.write(question + prompt) choice = raw_input().lower() if default is not None and choice == '': return default elif choice in valid.keys(): return valid[choice] else: sys.stdout.write("Please respond with 'yes', 'no' or 'quit'.\n")