python多线程中获取函数返回值的三种方法
目录
- 方法一:使用队列
- 方法二: 封装 threading.Thread,重写 run 方法
- 方法三:使用进程池
方法一:使用队列
import queue import threading import sys import time q=queue.Queue() def func1(x,y): func_name = sys._getframe().f_code.co_name # 获取函数名 print("%s run ....." % func_name) q.put((x+y,func_name)) def func2(x,y): func_name = sys._getframe().f_code.co_name print("%s run ...." %func_name) q.put((x-y,func_name)) if _js_name__ == "__main__": result=[] t1=threading.Thread(target=func1,name="thread1",args=(10,5)) t2=threading.Thread(target=func2,name="thread2",args=(20,1)) print('*'*20) t1.start() t2.start() t1.join() t2.join() while not q.empty():# 队列为空返回True,反之False result.append(q.get()) for item in result: if item[1] == func1.__name__: print("%s returjsn value is: %s" %(item[1],item[0])) elif item[1] == func2.__name__: print("%s return value is: %s" %(item[1],item[0]))
运行结果:
********************func1 run .....func2 run ....func1 return value is: 15func2 return value is: 19
方法二: 封装 threading.Thread,重写 run 方法
class mythread(threading.Thread): def __init__(self,func,arKKGLHrqCjrgs=()): 编程 super(mythread, self).__init__() self.func=func self.args=args def run(self): self.result=self.func(*self.args) def get_result(self): try: return self.result except Exception: return None def foo(a,b,c): time.sleep(1) return a*2,b*2,c*2 li = [] for 编程客栈i in range(4): t=mythread(foo,args=(i,i+1,i+2)) li.append(t) t.start() for t in li: t.join() print(t.get_result()) # 运行结果 (0, 2, 4) (2, 4, 6) (4, 6, 8) (6, 8, 10)
方法三:使用进程池
def func(msg): print("msg:",msg) time.sleep(3) print("end") return "done" + msg if __name__ == "__main__": pool 开发者_Python教程= multiprocessing.Pool(processes=4) result = [] for i in range(3): msg = "hello %d" %i result.append(pool.apply_async(func,(msg,))) pool.close() pool.join() for res in result: print(res) print(":::",res.get()) # 运行结果 msg: hello 0 msg: hello 1 msg: hello 2 end end end <multiprocessing.pool.ApplyResult object at 0x0000027BF6B3F0D0> ::: donehello 0 <multiprocessing.pool.ApplyResult object at 0x0000027BF6F4FDF0> ::: donehello 1 <multiprocessing.pool.ApplyResult object at 0x0000027BF6F4FDC0> ::: donehello 2
到此这篇关于python多线程中获取函数返回值的三种方法的文章就介绍到这了,更多相关python多线程中获取函数返回值内容请搜索我们以前的文章或继续浏览下面的相关文章希望大家以后多多支持我们!
精彩评论