code: def OnInit(self):
          
  
          # Get command line options and arguments
          cmdp = Commandlineparser()
          options, filename = cmdp.parse()
  
          kwargs = {
              "title": "pyspread",
              "S": self.S
          }
  
          # Store command line input in config if no file is provided
          if filename is None:
              kwargs["dimensions"] = options.dimensions
  
          # Main window creation
          from src.gui._main_window import MainWindow
  
          self.main_window = MainWindow(None, **kwargs)
  
          # Initialize file loading via event
  
          if gnupg is not None and options.new_gpgkey:
              # Create GPG key if not present
  
              try:
                  from src.lib.gpg import genkey
                  self.config["gpg_key_fingerprint"] = repr("")
                  genkey()
  
              except ImportError:
                  pass
  
              except ValueError:
                  # python-gnupg is installed but gnupg is not installed
                  pass
  
          # Show application window
          self.SetTopWindow(self.main_window)
          self.main_window.Show()
  
          # Load filename if provided
          if filename is not None:
              post_command_event(self.main_window, self.GridActionOpenMsg,
                                 attr={"filepath": filename})
              self.main_window.filepath = filename
  
          return True
docs: Init class that is automatically run on __init__