线程里的函数怎么引用不到实例化的属性？
下面的程序把 wincc.SetValue("ph",6.0)放在init()函数里不会报错，把它放在新开的线程message_handle(client, info)里就报错，说没这个属性。
import socket# 导入 socket 模块
from threading import Thread
import time
import json
import re
import win32com.client as win
ADDRESS = ('127.0.0.1', 1900)# 绑定地址
g_socket_server = None# 负责监听的socket
g_conn_pool = {}# 连接池
wincc = win.Dispatch(r'WinCC-Runtime-Project')
#wincc.SetValue("NewTag",value)
#wincc.GetValue("test2")
def init():
"""
初始化服务端
"""
global g_socket_server
g_socket_server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
g_socket_server.bind(ADDRESS)
g_socket_server.listen(5)# 最大等待数（有很多人理解为最大连接数，其实是错误的）
print("server start，wait for client connecting...")
#wincc.SetValue("ph",5.0)
def accept_client():
"""
接收新连接
"""
#wincc.SetValue("ph",5.0)
while True:
client, info = g_socket_server.accept()# 阻塞，等待客户端连接
# 给每个客户端创建一个独立的线程进行管理
thread = Thread(target=message_handle, args=(client, info))
# 设置成守护线程
thread.setDaemon(True)
thread.start()
def message_handle(client, info):
"""
消息处理
"""
wincc.SetValue("ph",5.0)
#client.sendall("connect server successfully!".encode(encoding='utf8'))
while True:
try:
bytes = client.recv(8192)
msg = bytes.decode(encoding='utf8')
if msg != '':
print("1")
except Exception as e:
print(e)
remove_client(client_type)
break
def remove_client(client_type):
client = g_conn_pool
if None != client:
client.close()
g_conn_pool.pop(client_type)
print("client offline: " + client_type)
if __name__ == '__main__':
init()
# 新开一个线程，用于接收新连接
thread = Thread(target=accept_client)
thread.setDaemon(True)
thread.start()
# 主线程逻辑
while True:
time.sleep(0.1)
#print('33')
#wincc.SetValue("ph",6.0)
上面的程序把 wincc.SetValue("ph",6.0)放在init()函数里不会报错，把它放在新开的线程message_handle(client, info)里就报错，说没这个属性。
错误是：Exception in thread Thread-4:
Traceback (most recent call last):
File "C:\Users\a\AppData\Local\Programs\Python\Python38-32\lib\threading.py", line 932, in _bootstrap_inner
self.run()
File "C:\Users\a\AppData\Local\Programs\Python\Python38-32\lib\threading.py", line 870, in run
self._target(*self._args, **self._kwargs)
File "C:/python学习/test.py", line 53, in message_handle
wincc.SetValue("ph",5.0)
File "C:\Users\a\AppData\Local\Programs\Python\Python38-32\lib\site-packages\win32com\client\dynamic.py", line 639, in __getattr__
raise AttributeError("%s.%s" % (self._username_, attr))
AttributeError: WinCC-Runtime-Project.SetValue 已解决。
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