text: import os
  import sys
  
  from PyQt5 import QtWidgets
  
  
  sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), '.')))
  
  from app.controller import Controller
  
  
  if __name__ == '__main__':
      app = QtWidgets.QApplication([])
  
      controller = Controller()
      controller.run_app()
  
      # Wrapping the GUI execution into `sys.exit()` to ensure that proper result code
      # will be returned when the window closes (otherwise it's always 0)
      sys.exit(app.exec())
  