我定义了一个global全局变量,在一个进程中对这个变量赋值,然后想在一个线程中使用这个变量,但是发现线程中并没有收到应该被赋值的全局变量,不知道是什么原因,以下是我的部分代码
global a
a = {}
class Control_system(QMainWindow, Ui_Control_system):
socketQueue = multiprocessing.Queue()
def __init__(self, parent=None):
super().__init__(parent)
self.setupUi(self)
self.p1 = multiprocessing.Process(target=Control_system.connect, args=(self.socketQueue,))
self.p1.start()
self.timer = QTimer(self)
self.timer.timeout.connect(self.client)
self.timer.start(1000)
@staticmethod
def connect(queue):
ip_port = ("192.168.1.251", 8880)
s = socketserver.ThreadingTCPServer(ip_port, MyServer)
s.serve_forever()
def client(self):
print(a)
# 这里的a还是空字典
class MyServer(socketserver.BaseRequestHandler):
def handle(self):
print("conn is :", self.request) # conn
print("addr is :", self.client_address) # addr
a[self.client_address] = self.request
print("a:",a)
# 这里的a是有值的
if __name__ == '__main__':
if not QApplication.instance():
app = QApplication(sys.argv)
else:
app = QApplication.instance()
w = Control_system()
w.show()
sys.exit(app.exec())