wxPython: Setting Value into Sheet in thread - python-2.7

Question

I want to set value into sheet using thread.
import time
import wx
from wx.lib import sheet
from threading import Thread
EVT_RESULT_ID = wx.NewId()
def EVT_RESULT(win, func):
win.Connect(-1, -1, EVT_RESULT_ID, func)
class ResultEvent(wx.PyEvent):
def __init__(self, data):
wx.PyEvent.__init__(self)
self.SetEventType(EVT_RESULT_ID)
self.data = data
class TestThread(Thread):
def __init__(self, wxObject,sheet):
Thread.__init__(self)
self.wxObject = wxObject
self.sheet=sheet
self.start()
def run(self):
self.sheet.sheetload()
wx.PostEvent(self.wxObject, ResultEvent(self.sheet))
class MySheet(sheet.CSheet):
def __init__(self, parent):
sheet.CSheet.__init__(self, parent)
self.SetNumberRows(100)
self.SetNumberCols(30)
def sheetload(self):
self.SetNumberRows(200)
self.SetNumberCols(30)
self.EnableEditing(False)
for i in range(200):
for j in range(30):
self.SetCellValue(i,j,str(i))
class Newt(wx.Frame):
def __init__(self):
wx.Frame.__init__(self, None,-1, "Tutorial")
self.box = wx.BoxSizer(wx.VERTICAL)
toolbar2 = wx.ToolBar(self, wx.TB_HORIZONTAL | wx.TB_TEXT,size = (1000, 40))
self.show_btn =wx.Button(toolbar2, label="show")
self.show_btn.Enable(True)
self.Bind(wx.EVT_BUTTON, self.onShow,self.show_btn)
toolbar2.AddControl(self.show_btn)
self.box.Add((5,5) , 0)
self.box.Add(toolbar2)
self.box.Add((5,10) , 0)
toolbar2.Realize()
self.notebook = wx.Notebook(self, -1, style=wx.RIGHT)
self.box.Add(self.notebook, 1, wx.EXPAND)
self.Maximize(True)
self.SetSizer(self.box)
EVT_RESULT(self, self.updateDisplay)
def onShow(self, event):
sheet=MySheet(self.notebook)
TestThread(self,sheet)
def updateDisplay(self, msg):
t = msg.data
self.notebook.AddPage(t,"Logs")
app = wx.PySimpleApp()
frame = Newt().Show()
app.MainLoop()
Here I am using sheetload function defined in Mysheet to execute in TestThread. So i can set value into sheet in background without blocking main gui.
But i am getting this error, and my gui is crashing.
(python2.7:10775): GLib-CRITICAL **: Source ID 559 was not found when attempting to remove it
can you help me, what is wrong with this code.