05-02協程gevent(monkey)の使用(同時)は便利で速い

import gevent
import time
from gevent import monkey


#       ，        ，  gevent        
monkey.patch_all()


def f(n):
	for i in range(n):
		print('---%d---' % i)
		time.sleep(0.5)

#　gevent.joinall()          ，       。gevent.spawn()        ， joinall    
gevent.joinall([gevent.spawn(f,5),gevent.spawn(f,10)])

例題:画像を這い出す

import urllib.request
import gevent
from gevent import monkey


monkey.patch_all()

def mydownload(img_name,img_url):
	response = urllib.request.urlopen(img_url)
	content = response.read()
	with open(img_name,'wb') as fp:
		fp.write(content)


def main():
	gevent.joinall([gevent.spawn(mydownload, "1.jpg", "http://pic.topmeizi.com/wp-content/uploads/2017a/04/08/01.jpg"),
	gevent.spawn(mydownload, '2.jpg', 'http://pic.topmeizi.com/wp-content/uploads/2017a/04/07/01.jpg')])