介绍
pool = ThreadPool(poolsize)
requests = makeRequests(some_callable, list_of_args, callback)
[pool.putRequest(req) for req in requests]
pool.wait()
第一行定义了一个线程池,表示最多可以创建poolsize这么多线程;
第二行是调用makeRequests创建了要开启多线程的函数,以及函数相关参数和回调函数,其中回调函数可以不写,default是无,也就是说makeRequests只需要2个参数就可以运行;
第三行用法比较奇怪,是将所有要运行多线程的请求扔进线程池,[pool.putRequest(req) for req in requests]等同于
for req in requests:
pool.putRequest(req)
第四行是等待所有的线程完成工作后退出。
一般方式
import time
def sayhello(str):
print("Hello ",str)
time.sleep(2)
name_list =['xiaozi','aa','bb','cc']
start_time = time.time()
for i in range(len(name_list)):
sayhello(name_list[i])
print('%d second'% (time.time()-start_time))
Hello xiaozi
Hello aa
Hello bb
Hello cc
8 second
线程池方式
import time
import threadpool
def sayhello(str):
print("Hello ",str)
time.sleep(2)
name_list =['xiaozi','aa','bb','cc']
start_time = time.time()
pool = threadpool.ThreadPool(10)
requests = threadpool.makeRequests(sayhello, name_list)
[pool.putRequest(req) for req in requests]
pool.wait()
print('%d second'% (time.time()-start_time))
Hello xiaozi
Hello aa
Hello bb
Hello cc
2 second