from PyQt5.Qt import *import sysclass Window(QWidget): def __init__(self, title): self.title = title super().__init__() self.initUI() self.setGeometry(300, 200, 300, 200) self.setWindowTitle(self.title) self.show() def initUI(self): btn = QPushButton() btn.setParent(self) btn.setText("我是按钮") btn.clicked.connect(self.helloWolrd) def helloWolrd(self): print("这是我的第一个PyQt程序")if __name__ == '__main__': app = QApplication(sys.argv) ex = Window("I AM AESCR") sys.exit(app.exec_())