printout

import sys
from PyQt5.QtCore import pyqtSignal, QObject
from PyQt5.QtGui import QTextCursor
from PyQt5.QtWidgets import QApplication, QMainWindow

from untitled1228 import Ui_MainWindow
class Signal(QObject):
    text_update = pyqtSignal(str)
    def write(self, text):
        self.text_update.emit(str(text))
        # loop = QEventLoop()
        # QTimer.singleShot(100, loop.quit)
        # loop.exec_()
        QApplication.processEvents()
class Mainworkwindow(QMainWindow, Ui_MainWindow):
    def __init__(self):
        super().__init__()
        self.setupUi(self)
        sys.stdout = Signal()
        sys.stdout.text_update.connect(self.updatetext)
        self.pushButton.clicked.connect(self.f)
    def updatetext(self, text):
        cursor = self.textBrowser.textCursor()
        cursor.movePosition(QTextCursor.End)
        self.textBrowser.append(text)
        self.textBrowser.setTextCursor(cursor)
        self.textBrowser.ensureCursorVisible()

    def f(self):
        print("12345669")
        print("ttttt")
if __name__ == "__main__":

    app = QApplication(sys.argv)
    win= Mainworkwindow()
    win.show()
    sys.exit(app.exec_())
 from PyQt5 import QtCore, QtGui, QtWidgets


class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(80, 120, 75, 23))
        self.pushButton.setObjectName("pushButton")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(80, 190, 54, 12))
        self.label.setObjectName("label")
        self.textBrowser = QtWidgets.QTextBrowser(self.centralwidget)
        self.textBrowser.setGeometry(QtCore.QRect(70, 250, 256, 192))
        self.textBrowser.setObjectName("textBrowser")
        self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit.setGeometry(QtCore.QRect(450, 130, 113, 20))
        self.lineEdit.setObjectName("lineEdit")
        self.textEdit = QtWidgets.QTextEdit(self.centralwidget)
        self.textEdit.setGeometry(QtCore.QRect(430, 280, 104, 71))
        self.textEdit.setObjectName("textEdit")
        self.textEdit_2 = QtWidgets.QTextEdit(self.centralwidget)
        self.textEdit_2.setGeometry(QtCore.QRect(430, 380, 104, 71))
        self.textEdit_2.setObjectName("textEdit_2")
        self.textBrowser_2 = QtWidgets.QTextBrowser(self.centralwidget)
        self.textBrowser_2.setGeometry(QtCore.QRect(180, 10, 256, 192))
        self.textBrowser_2.setObjectName("textBrowser_2")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 23))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.pushButton.setText(_translate("MainWindow", "PushButton"))
        self.label.setText(_translate("MainWindow", "TextLabel"))