Python - socket + tkinter

#!/usr/bin/python

from Tkinter import *
import threading
import socket

class Manager(object):

    def __init__(self):

        self.address = []
        self.connction = []

        self.GUI1 = Tk()
        self.GUI1.title('welcome to admin control')
        self.GUI1.geometry('800x800')

        self.ListTargets = Listbox(self.GUI1, width=95, fg='green', bg='black', font=2)
        self.ListTargets.pack()

        self.butt = Button(self.GUI1, text='reflesh', font=5, command=self.numberConns)
        self.butt.pack(anchor=CENTER)

        OpenConnction = threading.Thread(target=self.StartSockets)
        OpenConnction.daemon = True
        OpenConnction.start()

        mainloop()

    def StartSockets(self):

        host = '127.0.0.1'
        port = 4434

        while True:
            try:
                self.s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

                # solution for "[Error 89] Address already in use". Use it before bind()
                self.s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

                self.s.bind((host, port))
                self.s.listen(20)

                while True:
                    try:
                        conn, addr = self.s.accept()
                        conn.setblocking(1)
                        self.connction.append(conn)
                        self.address.append(addr)
                        print 'hello', addr
                    except Exception, e:
                        print 'problem with accept'
                        print 'exception:', e

            except Exception, e:
                print 'problem with socket, bind or listen'
                print 'exception:', e

                # close all socket

                for c in self.connction:
                    c.close()
                self.s.close()

                # clear all lists

                self.connction = []
                self.address = []

    def numberConns(self):
        # remove all elements from listbox
        self.ListTargets.delete(0, 'end')

        # add all elements again to listbox
        for addr in self.address:
            self.ListTargets.insert('end', addr)

# --- main ---

Manager()