python 全局变量不保存为全局
NexusConnectedClients = []
class Thread1(NexusCore.Thread):
def Run():
global NexusConnectedClients
if(IncomingCommand == "ADDCLIENT"):
NewClientOBJ = [
LastCID,
ClientType,
ClientADDR,
ClientObject,
Args[1],
Args[2],
'{"events":[]}'
]
NexusConnectedClients.append(NewClientOBJ)
elif(IncomingCommand == "LISTCLIENTS"):
SendResponse(NexusConnectedClients)
当我添加客户端时，就可以了。当我读取 NexusConnectedClients 变量时，它被添加到列表中。 但是当我运行 LISTCLIENTS 函数时，列表为空。怎么了？
我稍微简化了代码。所有变量都已设置，并且所有其他全局变量都按其应有的方式工作。
编辑 我发现了错误，这段代码没有任何问题，但另一个函数从 NexusConnectedClients 数组中删除了该元素
NexusConnectedClients = []
class Thread1(NexusCore.Thread):
def Run():
global NexusConnectedClients
if(IncomingCommand == "ADDCLIENT"):
NewClientOBJ = [
LastCID,
ClientType,
ClientADDR,
ClientObject,
Args[1],
Args[2],
'{"events":[]}'
]
NexusConnectedClients.append(NewClientOBJ)
elif(IncomingCommand == "LISTCLIENTS"):
SendResponse(NexusConnectedClients)
When i add an client, it is ok. When i read the NexusConnectedClients variable, it is add to the list.
But when i run the LISTCLIENTS function, the list is empty. What is wrong?
I Simplified the code a bit. all the variables are set and all other global variables work as they should.
EDIT
I found the mistake, nothing wrong with this code but another function deleted the element from the NexusConnectedClients array
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评论（2）
您无需将 NexusConnectedClients 声明为全局，因为它在
run方法中可见。当您想要（重新）绑定全局范围内的名称时，必须将变量声明为全局变量。当变量是可修改的（列表也是如此）时，只需修改它即可。相反，您需要做的是规范对 NexusConnectedClients 的访问。您正在修改线程内的共享变量，可能不止一个。使用锁。说了这么多，我想在这么小的片段中已经没有什么可以说的了。
You don't need to declare
NexusConnectedClientsas global since it is visible in therunmethod. A variable must be declared global when you want to (re)bind a name in the global scope. When a variable is modifiable, and lists are, just modify it.Instead what you have to do is to regulate the access to the
NexusConnectedClients. You are modifying a shared variable inside a thread, maybe more than one. Use a lock. Said that, I think nothing more could be said in a such small snippet.解决了问题。没有从之前的测试中删除一行代码。该行重置了数组
Solved the problem. Didn't remove an line of code from previous testing. That line resetted the array