[Twisted-Python] how to implement sleep?

[ruslan usifov]

Hello

Twisted is great, but how cant i emulate sleep behaviour in syested. I know
that exists callLater, but how to use it in yield scenario, like here:

@inlineCallbacks
def work(self):
    l_attempts = 0;

    while l_attemps < 3:
        try:
            resp = yield <some twisted call>
            break;

        except:
            yield sleep(3);
            l_attempts +=1

    else:
        log.err("cant communicate");


Here i make 3 attempts to connect busy service, with pause 3 seconds between
attempts. How cant i implement this in twisted
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