[Tutor] Exchanging window data

[Glen Barnett]

I'm writing a script to use any number of windows and I'm interested in
exchanging data among them. In the sample I have here the main window passes
a method name "hitCntl" and a variable name "self.messag" to the new windows
when they are created using the class Frm1. When a button is pressed a
message is added to the variable and the method is called. Is this the
proper technique? What other ways are there?  I noticed if I use
self.messag=[] in  "hitCntl" instead of self.messag.pop(0) to clear it then
the messages no longer work even though the name is the same.

Thanks
Glen

#
from Tkinter import *
class Frm1:
   def __init__(self,frame,mess,note,name):
            self.name1=name
            self.message=mess
            self.note1=note
            self.bb=Button(frame,text="Hello",command=self.b2c)
            self.bb.pack()
   def b2c(self):
        self.message.append(self.note1)
            self.name1()

class MAIN1:
   def __init__(self,frame):
        self.messag=[]
            for x in range(25):
                        w2=Toplevel()
                        tm= "Hello from %d" %x
                        Frm1(w2,self.messag,tm,self.hitCntl)
   def hitCntl(self):
            print "Redirected"
            print self.messag
            self.messag.pop(0)

if __name__ =="__main__":
   root=Tk()
   cf=MAIN1(root)
   root.mainloop()