演示生命周期和重定向

# _*_ coding: utf-8 _*_
__author__ = 'pythonwu'
__date__ = "2018/5/15 15:05"

import wx
import sys

class Frame(wx.Frame):

    def __init__(self,parent,id,title):
        print('Frame __init__')
        wx.Frame.__init__(self,parent,id,title)

class App(wx.App):

    def __init__(self,redirect = True,filename = None):
        print('App __init__')
        wx.App.__init__(self,redirect,filename)

    def OnInit(self):
        print('OnInit') #输出到stdout
        self.frame = Frame(parent=None,id=-1,title='Startup') #创建框架
        self.frame.Show()
        self.SetTopWindow(self.frame)
        # print >> sys.stderr,'A pretend error message' #输出到stderr
        print('A pretend error message',file =sys.stderr)
        return True

    def OnExit(self):
        print("OnExit")  #窗口消失的太快，无法被屏幕捕获

if __name__ == '__main__':
    app = App(redirect=True)  #文本重定向从这里开始
    print("before MainLoop")
    app.MainLoop()
    print("after MainLoop")