如何在PyQt5应用程序中实现输出窗口？

from PyQt5 import QtWidgets, QtCore

class MainWindow(QtWidgets.QMainWindow):
    def __init__(self):
        super(MainWindow, self).__init__()
        self.setWindowTitle("输出窗口示例")
        self.setGeometry(100, 100, 400, 300)

class MainWindow(QtWidgets.QMainWindow):
    def __init__(self):
        super(MainWindow, self).__init__()
        self.setWindowTitle("输出窗口示例")
        self.setGeometry(100, 100, 400, 300)
        
        self.text_edit = QtWidgets.QTextEdit(self)
        self.setCentralWidget(self.text_edit)

class MainWindow(QtWidgets.QMainWindow):
    def __init__(self):
        super(MainWindow, self).__init__()
        self.setWindowTitle("输出窗口示例")
        self.setGeometry(100, 100, 400, 300)
        
        self.text_edit = QtWidgets.QTextEdit(self)
        self.setCentralWidget(self.text_edit)
        
    def output_message(self, message):
        self.text_edit.append(message)

class MainWindow(QtWidgets.QMainWindow):
    def __init__(self):
        super(MainWindow, self).__init__()
        self.setWindowTitle("输出窗口示例")
        self.setGeometry(100, 100, 400, 300)
        
        self.text_edit = QtWidgets.QTextEdit(self)
        self.setCentralWidget(self.text_edit)
        
    def output_message(self, message):
        self.text_edit.append(message)
        
# 创建应用程序并显示主窗口
app = QtWidgets.QApplication(sys.argv)
window = MainWindow()
window.show()

# 输出信息到窗口
window.output_message("Hello World!")

# 运行应用程序的主循环
sys.exit(app.exec_())