How to create and use wxapp application objects

#  ! /Usr/bin/Python  #  -*-<Coding = UTF-8> -*-  """  WxpythonProgramGiven by two necessary objects: Application object, that is, wx. app or its subclass object; top-level window object, that is, wx. frame or its subclass object; create a wx. sub-classes of the app. Four steps are required: 1. define this subclass; 2. write an oninit () method in the defined subclass 3. create an instance of this subclass in your program; 4. call the mainloop () method of the application instance, which gives control of the program to wxpython  """  Import  WX  Class  MyApp (wx. app ):  # This is the first step. It defines the child class of Wx. App;      #  Compile oninit () method      Def  Oninit (Self ):  """  Create a top-level window object in the Application object. Call the show method of the top-level window object to display it.  """  Frame = Wx. Frame (ID =-1, parent = none, Pos = wx. defaultposition, size = Wx. defaultsize) frame. Show ()  #  The oninit () method must return a bool value.      Return  True #  Step 3: instantiate MyApp APP = MyApp ()  #  Step 4: Call the mainloop Method App. mainloop ()