PYQT5实现控制台显示功能

首先，写一个信号，用来发射标准输出作为信号

class EmittingStream(QtCore.QObject):  
        textWritten = QtCore.pyqtSignal(str)  #定义一个发送str的信号
def write(self, text):
            self.textWritten.emit(str(text))  

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()