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Zsolt Harasztid4226ed2016-10-05 17:49:27 -07001#
2# Copyright 2016 the original author or authors.
3#
4# Licensed under the Apache License, Version 2.0 (the "License");
5# you may not use this file except in compliance with the License.
6# You may obtain a copy of the License at
7#
8# http://www.apache.org/licenses/LICENSE-2.0
9#
10# Unless required by applicable law or agreed to in writing, software
11# distributed under the License is distributed on an "AS IS" BASIS,
12# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13# See the License for the specific language governing permissions and
14# limitations under the License.
15#
16
17""" Async sleep (asleep) method and other twisted goodies """
18
19from twisted.internet import reactor
20from twisted.internet.defer import Deferred
21
22
23def asleep(dt):
Zsolt Haraszti023ea7c2016-10-16 19:30:34 -070024 """
25 Async (event driven) wait for given time period (in seconds)
26 :param dt: Delay in seconds
27 :return: Deferred to be fired with value None when time expires.
28 """
Zsolt Harasztid4226ed2016-10-05 17:49:27 -070029 d = Deferred()
30 reactor.callLater(dt, lambda: d.callback(None))
31 return d