线程_gevent自动切换CPU协程

import gevent
def f(n):
    for i in range(n):
        print (gevent.getcurrent(), i)
        # gevent.getcurrent() 获取当前进程

g1 = gevent.spawn(f, 3)#函数名,数目
g2 = gevent.spawn(f, 4)
g3 = gevent.spawn(f, 5)
g1.join()
g2.join()
g3.join()

---

import gevent

def f(n):
    for i in range(n):
        print (gevent.getcurrent(), i)
        #用来模拟一个耗时操作，注意不是time模块中的sleep
        gevent.sleep(1)

g1 = gevent.spawn(f, 2)
g2 = gevent.spawn(f, 3)
g3 = gevent.spawn(f, 4)
g1.join()
g2.join()
g3.join()

---

import gevent
import random
import time

def coroutine_work(coroutine_name):
    for i in range(10):
        print(coroutine_name, i)
        time.sleep(random.random())

gevent.joinall([
        # 添加可以切换的协程
        gevent.spawn(coroutine_work, "work0"),
        gevent.spawn(coroutine_work, "work1"),
        gevent.spawn(coroutine_work, "work2")
])

---

from gevent import monkey
import gevent
import random
import time

# 有耗时操作时需要
monkey.patch_all()#自动切换协程
# 将程序中用到的耗时操作的代码，换为gevent中自己实现的模块

def coroutine_work(coroutine_name):
    for i in range(10):
        print(coroutine_name, i)
        time.sleep(random.random())

gevent.joinall([
        gevent.spawn(coroutine_work, "work"),
        gevent.spawn(coroutine_work, "work1"),
        gevent.spawn(coroutine_work, "work2")
])

---

2020-05-07