python全局变量
import multiprocessing from multiprocessing.managers import BaseManager import threading # 锁可以通过global也可以在Process中传无所谓 share_lock = threading.Lock() # 定义一个要共享实例化对象的类 class Test(): def __init__(self): self.test_list = ["start flag"] def test_function(self,arg): self.test_list.append(arg) def print_test_list(self): for item in self.test_list: print(f"{item}") def sub_process(process_name,obj): global share_lock share_lock.acquire() obj.test_function(f"{process_name}") share_lock.release() obj.print_test_list() pass def main_process(): # 如果是想注册open方法这样操作 # manager = BaseManager() # # 一定要在start前注册,不然就注册无效 # manager.register('open', open) # manager.start() # obj = manager.open("1.txt","a") # 为了更加直接我们直接以一个Test类的实例化对象来演示 manager = BaseManager() # 一定要在start前注册,不然就注册无效 manager.register('Test', Test) manager.start() obj = manager.Test() process_list = [] # 创建进程1 process_name = "process 1" tmp_process = multiprocessing.Process(target=sub_process,args=(process_name,obj)) process_list.append(tmp_process) # 创建进程2 process_name = "process 2" tmp_process = multiprocessing.Process(target=sub_process, args=(process_name,obj)) process_list.append(tmp_process) # 启动所有进程 for process in process_list: process.start() for process in process_list: process.join() if __name__ == "__main__": main_process()
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