#coding=utf-8import threading
import timedef computed():i = 0for n in xrange(100000000):i += 1thread_list = []for _ in range(2):time_begin = time.time()thread_list.append(threading.Thread(target=computed))thread_list[_].start()thread_list[_].join()print '两线程串行总运行时间：{}'.format(time.time() - time_begin)# 两线程串行总运行时间：3.20499992371

#coding=utf-8import threading
import timedef computed():i = 0for n in xrange(100000000):i += 1thread_list = []for _ in range(2):time_begin = time.time()thread_list.append(threading.Thread(target=computed))thread_list[_].start()for t in range(2):thread_list[t].join()print '两线程并行总运行时间：{}'.format(time.time() - time_begin)# 两线程并行总运行时间：23.4430000782

#coding=utf-8import threading
import timen, thread_list = 0, []def computed():global nn += 1for _ in xrange(10000):thread_list.append(threading.Thread(target=computed))thread_list[_].start()for t in thread_list:t.join()print n

#coding=utf-8import threadingdef run1():print 'grab the first part data'lock.acquire()global numnum += 1lock.release()return numdef run2():print 'grab the second part data'lock.acquire()global num2num2 += 1lock.release()return num2def run3():lock.acquire()res = run1()print '-------between run1 and run2------'res2 = run2()lock.release()print res, res2num, num2 = 0, 0
lock = threading.Lock()
for i in range(10):t = threading.Thread(target=run3)t.start()while threading.active_count() != 1:print threading.active_count()
else:print '---all threads done---'print num, num2