text: import sys
  from cn.pyQt.lesson.capter2 import MaxMinSize
  
  from PyQt5.QtWidgets import QApplication, QMainWindow
  
  
  if __name__ == '__main__':
      app = QApplication(sys.argv)
      mainWindows = QMainWindow()
      ui = MaxMinSize.Ui_MainWindow()
      ui.setupUi(mainWindows)
      mainWindows.setWindowTitle("默认的最大最小尺寸学习")
      mainWindows.show()
      sys.exit(app.exec_())
  
  
  