python pubsub订阅多个主题

有两种方法。首先，也许是最简单的，您可能只有一个听众。当发布给侦听器时，您只需传递不同的信息即可。例如，从A类，您将传递一个字符串。对于类B，您可以传递不同的字符串，但要传递给同一侦听器。然后，在侦听器中，只需检查您提到的字符串即可。

另一种方法是创建全部绑定到同一函数或方法的多个侦听器。然后，您可以发布给不同的侦听器，他们都将调用同一件事。

您应该使用最容易理解和调试的方法。

这是一个例子：

import wx
from wx.lib.pubsub import pub 

########################################################################
class OtherFrame(wx.Frame):
    """"""

    #----------------------------------------------------------------------
    def __init__(self):
        """Constructor"""
        wx.Frame.__init__(self, None, wx.ID_ANY, "Secondary Frame")
        panel = wx.Panel(self)

        msg = "Enter a Message to send to the main frame"
        instructions = wx.StaticText(panel, label=msg)
        self.msgTxt = wx.TextCtrl(panel, value="")

        sendBtn = wx.Button(panel, label="Send Msg")
        sendBtn.Bind(wx.EVT_BUTTON, self.onSendMsg)

        closeBtn = wx.Button(panel, label="Send and Close")
        closeBtn.Bind(wx.EVT_BUTTON, self.onSendAndClose)

        sizer = wx.BoxSizer(wx.VERTICAL)
        flags = wx.ALL|wx.CENTER
        sizer.Add(instructions, 0, flags, 5)
        sizer.Add(self.msgTxt, 0, flags, 5)
        sizer.Add(sendBtn, 0, flags, 5)
        sizer.Add(closeBtn, 0, flags, 5)
        panel.SetSizer(sizer)

    #----------------------------------------------------------------------
    def onSendMsg(self, event):
        """"""
        msg = "Another message!"
        pub.sendMessage("anotherListener", 
                        message=msg,
                        listener="anotherListener")

    #----------------------------------------------------------------------
    def onSendAndClose(self, event):
        """
        Send a message and close frame
        """
        msg = self.msgTxt.GetValue()
        pub.sendMessage("panelListener", 
                        message=msg,
                        listener="panelListener")
        self.Close()

########################################################################
class MyPanel(wx.Panel):
    """"""

    #----------------------------------------------------------------------
    def __init__(self, parent):
        """Constructor"""
        wx.Panel.__init__(self, parent)
        pub.subscribe(self.myListener, "panelListener")
        pub.subscribe(self.myListener, "anotherListener")

        btn = wx.Button(self, label="Open Frame")
        btn.Bind(wx.EVT_BUTTON, self.onOpenFrame)

    #----------------------------------------------------------------------
    def myListener(self, message, listener=None):
        """
        Listener function
        """

        if listener == "panelListener":
            print "panel listener has sent the following: ",
            print message
        elif listener == "anotherListener":
            print "another listener sent the following: ", 
            print message

    #----------------------------------------------------------------------
    def onOpenFrame(self, event):
        """
        Opens secondary frame
        """
        frame = OtherFrame()
        frame.Show()

########################################################################
class MyFrame(wx.Frame):
    """"""

    #----------------------------------------------------------------------
    def __init__(self):
        """Constructor"""
        wx.Frame.__init__(self, None, title="New PubSub API Tutorial")
        panel = MyPanel(self)
        self.Show()

#----------------------------------------------------------------------
if __name__ == "__main__":
    app = wx.App(False)
    frame = MyFrame()
    app.MainLoop()

这是我的教程中经过修改的示例：http : //www.blog.pythonlibrary.org/2013/09/05/wxpython-2-9-and-the-newer-pubsub-api-a-simple-tutorial/