| # |
| # Copyright 2017 the original author or authors. |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| # |
| from __future__ import absolute_import |
| from twisted.internet import reactor |
| from twisted.internet.defer import Deferred |
| |
| |
| def asleep(dt): |
| """ |
| Async (event driven) wait for given time period (in seconds) |
| :param dt: Delay in seconds |
| :return: Deferred to be fired with value None when time expires. |
| """ |
| d = Deferred() |
| reactor.callLater(dt, lambda: d.callback(None)) |
| return d |