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async examples
import asyncio
loop = asyncio.get_event_loop()
async def hello():
await asyncio.sleep(3)
print('Hello!')
if __name__ == '__main__':
loop.run_until_complete(hello())
import asyncio
loop = asyncio.get_event_loop()
def hello():
loop.call_later(3, print_hello)
def print_hello():
print('Hello!')
loop.stop()
if __name__ == '__main__':
loop.call_soon(hello)
loop.run_forever()
import asyncio
loop = asyncio.get_event_loop()
@asyncio.coroutine
def hello():
yield from asyncio.sleep(3)
print('Hello!')
if __name__ == '__main__':
loop.run_until_complete(hello())
from eventlet import sleep
def hello():
sleep(3)
print('Hello!')
if __name__ == '__main__':
hello()
from gevent import sleep
def hello():
sleep(3)
print('Hello!')
if __name__ == '__main__':
hello()
from time import sleep
def hello():
sleep(3)
print('Hello!')
if __name__ == '__main__':
hello()
from twisted.internet import reactor
def hello():
reactor.callLater(3, print_hello)
def print_hello():
print('Hello!')
reactor.stop()
if __name__ == '__main__':
reactor.callWhenRunning(hello)
reactor.run()
from twisted.internet import reactor
from twisted.internet.defer import inlineCallbacks, Deferred
def sleep(secs):
d = Deferred()
reactor.callLater(secs, d.callback, None)
return d
@inlineCallbacks
def hello():
yield sleep(3)
print('Hello!')
reactor.stop()
if __name__ == '__main__':
reactor.callWhenRunning(hello)
reactor.run()
@kooky

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kooky commented Jul 4, 2017

I'd love an example of these with some loops

@shamhub

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shamhub commented Jul 13, 2017

@zhaowb

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zhaowb commented May 2, 2018

@kooky
Hope this can help

import gevent
from gevent import sleep
def hello():
    print('Hello')
    sleep(3)
    print('World')

jobs = [gevent.spawn(hello) for i in range(10)]
gevent.wait(jobs)
@jian-en

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jian-en commented May 7, 2018

@kooky

import asyncio

async def factorial(name, number):
f = 1
for i in range(2, number+1):
print("Task %s: Compute factorial(%s)..." % (name, i))
await asyncio.sleep(1)
f *= i
print("Task %s: factorial(%s) = %s" % (name, number, f))

loop = asyncio.get_event_loop()
loop.run_until_complete(asyncio.gather(
factorial("A", 2),
factorial("B", 3),
factorial("C", 4),
))
loop.close()

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