python ui转py的时候需要加上一点代码不然没反应

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow
import test  # module test.py

if __name__ == '__main__':
    app = QApplication(sys.argv)
    myMainWindow = QMainWindow()
    myUi = test.Ui_MainWindow()
    myUi.setupUi(myMainWindow)
    myMainWindow.show()
    sys.exit(app.exec_())