PYQT5实现控制台显示功能

class Ui_MainWindow(QtWidgets.QMainWindow):    def __init__(self):        super(Ui_MainWindow,self).__init__()        self.setupUi(self)        self.retranslateUi(self)            def setupUi(self, MainWindow):        MainWindow.setObjectName("MainWindow")        MainWindow.resize(1131, 667)        self.centralwidget = QtWidgets.QWidget(MainWindow)        self.centralwidget.setObjectName("centralwidget")        self.textEdit = QtWidgets.QTextEdit(self.scrollAreaWidgetContents_2)        self.textEdit.setGeometry(QtCore.QRect(0, 0, 731, 301))        self.textEdit.setObjectName("textEdit")        self.textEdit.setReadOnly(True)#下面将输出重定向到textEdit中        sys.stdout = EmittingStream(textWritten=self.outputWritten)          sys.stderr = EmittingStream(textWritten=self.outputWritten)  #接收信号str的信号槽    def outputWritten(self, text):          cursor = self.textEdit.textCursor()          cursor.movePosition(QtGui.QTextCursor.End)          cursor.insertText(text)          self.textEdit.setTextCursor(cursor)          self.textEdit.ensureCursorVisible()