python之线程2（单线程和多线程）

　　# -*- coding: UTF-8 -*- import threading from time import ctime, sleep  class MyThread(threading.Thread):     def __init__(self, func, args, name=＂＂):         threading.Thread.__init__(self)         self.name = name         self.func = func         self.args = args      def getResult(self):         return self.res      def run(self):         print ＂starting＂, self.name, ＂at:＂, ctime()         self.res = self.func(*self.args)         print self.name, ＂finished at:＂, ctime()# -*- coding: UTF-8 -*- from myThread import MyThread from time import ctime, sleep  #threading模块的其他函数 #activeCount/active_count(): 当前活动的Thread对象个数 #currentThread()/current_thread: 返回当前的Thread对象 #enumerate(): 放回当前活动的Thread对象列表 #settrace(func),为所有线程设置一个trace函数 #setprofile(func), 为所有线程设置一个profile函数 #stack_size(size=0), 返回新创建线程的栈大小，或为后续创建的线程设定栈的大小为size  #斐波那契，阶乘与累加 def fib(x):     sleep(0.005)     if x < 2: return 1     return (fib(x-2) + fib(x-1))  def fac(x):     sleep(0.1)     if x < 2: return 1     return (x * fac(x -1))  def sum(x):     sleep(0.1)     if x < 2: return  1     return (x + sum(x-1))  funcs = [fib, fac, sum] n = 12  def main():     nfuncs = range(len(funcs))      print ＂*** Single Thread＂     for i in nfuncs:         print ＂starting＂, funcs[i].__name__, ＂at:＂, ctime()         print funcs[i](n)         print funcs[i].__name__, ＂finished at:＂, ctime()      print ＂  *** MULTIPLE THREADS＂     threads = []     for i in nfuncs:         t = MyThread(funcs[i], (n,), funcs[i].__name__)         threads.append(t)      for i in nfuncs:         threads[i].start()      for i in nfuncs:         threads[i].join()         print threads[i].getResult()      print ＂all done＂  if __name__ == ＂__main__＂:     main()  #输出 # *** Single Thread # starting fib at: Fri May 13 23:18:47 2022 # 233 # fib finished at: Fri May 13 23:18:53 2022 # starting fac at: Fri May 13 23:18:53 2022 # 479001600 # fac finished at: Fri May 13 23:18:54 2022 # starting sum at: Fri May 13 23:18:54 2022 # 78 # sum finished at: Fri May 13 23:18:56 2022 # #  *** MULTIPLE THREADS # starting fib at: Fri May 13 23:18:56 2022 # starting fac at: Fri May 13 23:18:56 2022 # starting sum at: Fri May 13 23:18:56 2022 # facsum  finished at:finished at:  Fri May 13 23:18:57 2022Fri May 13 23:18:57 2022 # # fib finished at: Fri May 13 23:19:03 2022 # 233 # 479001600 # 78 # all done