一、安裝與簡介
pip install threadpool
pool = ThreadPool(poolsize) requests = makeRequests(some_callable, list_of_args, callback) [pool.putRequest(req) for req in requests] pool.wait()
第一行定義了一個線程池,表示最多可以創建poolsize這麼多線程;
第二行是調用makeRequests創建了要開啓多線程的函數,以及函數相關參數和回調函數,其中回調函數可以不寫,default是無,也就是說makeRequests只需要2個參數就可以運行;
第三行用法比較奇怪,是將所有要運行多線程的請求扔進線程池,[pool.putRequest(req) for req in requests]等同於
for req in requests:
pool.putRequest(req)
第四行是等待所有的線程完成工作後退出。
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)
當函數有多個參數的情況,函數調用時第一個解包list,第二個解包dict,所以可以這樣:
def hello(m, n, o):
""""""
print "m = %s, n = %s, o = %s"%(m, n, o)
if __name__ == '__main__':
# 方法1
lst_vars_1 = ['1', '2', '3']
lst_vars_2 = ['4', '5', '6']
func_var = [(lst_vars_1, None), (lst_vars_2, None)]
# 方法2
dict_vars_1 = {'m':'1', 'n':'2', 'o':'3'}
dict_vars_2 = {'m':'4', 'n':'5', 'o':'6'}
func_var = [(None, dict_vars_1), (None, dict_vars_2)]
pool = threadpool.ThreadPool(2)
requests = threadpool.makeRequests(hello, func_var)
[pool.putRequest(req) for req in requests]
pool.wait()