python_qt5控制台内容打印到textedit控件

代码部分：

from PyQt5 import QtCore, QtGui
import sys
from PyQt5.QtWidgets import QApplication, QMainWindow
import tqdm
import time

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
   def setupUi(self, MainWindow):
       MainWindow.setObjectName("MainWindow")
       MainWindow.resize(1337, 634)
       self.centralwidget = QtWidgets.QWidget(MainWindow)
       self.centralwidget.setObjectName("centralwidget")
       self.groupBox = QtWidgets.QGroupBox(self.centralwidget)
       self.groupBox.setGeometry(QtCore.QRect(100, 100, 741, 151))
       self.groupBox.setObjectName("groupBox")
       self.controlBrowser = QtWidgets.QTextBrowser(self.groupBox)
       self.controlBrowser.setGeometry(QtCore.QRect(10, 20, 721, 121))
       self.controlBrowser.setObjectName("controlBrowser")
       self.groupBox_wordvideo = QtWidgets.QGroupBox(self.centralwidget)
       self.groupBox_wordvideo.setGeometry(QtCore.QRect(100, 10, 501, 71))
       self.groupBox_wordvideo.setTitle("")
       self.groupBox_wordvideo.setObjectName("groupBox_wordvideo")
       self.butselectfiles = QtWidgets.QPushButton(self.groupBox_wordvideo)
       self.butselectfiles.setGeometry(QtCore.QRect(20, 30, 81, 23))
       self.butselectfiles.setObjectName("butselectfiles")
       MainWindow.setCentralWidget(self.centralwidget)
       self.menubar = QtWidgets.QMenuBar(MainWindow)
       self.menubar.setGeometry(QtCore.QRect(0, 0, 1337, 22))
       self.menubar.setObjectName("menubar")
       MainWindow.setMenuBar(self.menubar)
       self.statusbar = QtWidgets.QStatusBar(MainWindow)
       self.statusbar.setObjectName("statusbar")
       MainWindow.setStatusBar(self.statusbar)

       self.butselectfiles.clicked.connect(MainWindow.bClicked)
       self.retranslateUi(MainWindow)


       QtCore.QMetaObject.connectSlotsByName(MainWindow)

   def retranslateUi(self, MainWindow):
       _translate = QtCore.QCoreApplication.translate
       MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
       self.groupBox.setTitle(_translate("MainWindow", "信息栏"))
       self.butselectfiles.setText(_translate("MainWindow", "打印输出"))


class EmittingStr(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 ControlBoard(QMainWindow, Ui_MainWindow):
   def __init__(self):
       super(ControlBoard, self).__init__()
       self.setupUi(self)
       # 下面将输出重定向到controlBrowser中
       sys.stdout = EmittingStr(textWritten=self.outputWritten)
       sys.stderr = EmittingStr(textWritten=self.outputWritten)

       # self.pushButton.clicked.connect(self.bClicked)

   '''控制台内容打印到textEdit控件'''
   def outputWritten(self, text):
       cursor = self.controlBrowser.textCursor()  #获得指针对象
       cursor.movePosition(QtGui.QTextCursor.End)
       cursor.insertText(text)
       self.controlBrowser.setTextCursor(cursor)
       self.controlBrowser.ensureCursorVisible()

   def bClicked(self):
       """Runs the main function."""
       print('Begin')
       lt = ["a", "b", "c", "d"]
       for i in tqdm.tqdm(lt):
           # i = "a", "b", "c", "d"
           time.sleep(1)

       self.printABCD()

       print("End")

   def printABCD(self):
       print("aaaaaaaaaaaaaaaa")
       print("bbbbbbbbbbbbbbbb")
       print("cccccccccccccccc")
       print("dddddddddddddddd")


if __name__ == "__main__":
   app = QApplication(sys.argv)
   win = ControlBoard()
   win.show()
   # win.printABCD()
   sys.exit(app.exec_())