import gevent def func(): print("Hello, world!") delayed_greenlet = gevent.Greenlet(start_later=5, func) # starts func 5 seconds later delayed_greenlet.start()
import gevent import datetime def func(): print("Hello, world!") start_time = datetime.datetime.now() + datetime.timedelta(seconds=10) # start after 10 seconds delayed_greenlet = gevent.Greenlet(start_later=start_time, func) # starts func at start_time delayed_greenlet.start()In this example, we use a datetime object to specify the start time of the greenlet. We create a datetime object that represents the current time plus 10 seconds, and set `start_later` to this value. When the greenlet starts, it will execute `func` and print "Hello, world!" to the console. In conclusion, gevent is a Python package library that provides a concurrency framework using greenlets. The `start_later` function can be used to delay the start of a greenlet until a specified time using a timeout or a specific datetime object. This can be useful for scheduling tasks or controlling the flow of a program.