Source code for openquake.engine.utils

# -*- coding: utf-8 -*-
# vim: tabstop=4 shiftwidth=4 softtabstop=4
#
# Copyright (C) 2012-2018 GEM Foundation
#
# OpenQuake is free software: you can redistribute it and/or modify it
# under the terms of the GNU Affero General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# OpenQuake is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with OpenQuake. If not, see <http://www.gnu.org/licenses/>.


def confirm(prompt):
    """
    Ask for confirmation, given a ``prompt`` and return a boolean value.
    """
    while True:
        try:
            answer = input(prompt)
        except KeyboardInterrupt:
            # the user presses ctrl+c, just say 'no'
            return False
        answer = answer.strip().lower()
        if answer not in ('y', 'n'):
            print('Please enter y or n')
            continue
        return answer == 'y'