Source code for sbws.util.userquery

# Based on
[docs]def query_yes_no(question, default='yes'): ''' Ask a yes/no question via input() and return the user's answer. :param str question: Prompt given to the user. :param str default: The assumed answer if th user just hits **Enter**. It must be ``'yes'`` (the default if no default is given), ``'no'``, or ``None`` (meaning an answer is required from the user). :returns: ``True`` if we ended up with a 'yes' answer, otherwise ``False``. ''' valid = {'yes': True, 'y': True, 'ye': True, 'no': False, 'n': False} if default is None: prompt = ' [y/n] ' elif default == 'yes': prompt = ' [Y/n] ' elif default == 'no': prompt = ' [y/N] ' else: raise ValueError('invalid default answer: "%s"' % default) prompt = question + prompt first_loop = True while True: choice = input(prompt).lower() if default is not None and choice == '': return valid[default] elif choice in valid: return valid[choice] elif first_loop: prompt = 'Please respond with "yes" or "no" (or y or n).\n' +\ prompt first_loop = False