text: #!/usr/bin/env python
  import sys
  
  from PyQt5 import QtCore, QtWidgets
  from PyQt5.QtWidgets import QMainWindow, QLabel, QGridLayout, QWidget
  from PyQt5.QtCore import QSize
  
  class HelloWindow(QMainWindow):
      def __init__( self ):
          super().__init__()
  
          if sys.maxsize > (2**31):
              size_int_t = 64
          else:
              size_int_t = 32
  
          py_ver = '%d.%d-%d' % (sys.version_info.major, sys.version_info.minor, size_int_t)
  
          self.setMinimumSize( QSize(350, 100) )
          self.setWindowTitle( 'GUI test - python %s' % (py_ver,) )
  
          self.setCentralWidget( QLabel( ' GUI test - python %s ' % (py_ver,), self ) )
  
  if __name__ == "__main__":
      app = QtWidgets.QApplication( sys.argv )
      main_win = HelloWindow()
      main_win.show()
      sys.exit( app.exec_() )
  