问PyQT4 TextBrowser设置文本调整

EN

import sys
from PyQt5 import QtCore, QtGui, QtWidgets

class Win(QtWidgets.QWidget):
    def __init__(self):
        super().__init__()
        self.i = 5

        self.textBrowser = QtWidgets.QTextBrowser()
        
        self.textBrowser.setAlignment(QtCore.Qt.AlignCenter)  # <-------------
        
        layout = QtWidgets.QVBoxLayout()
        layout.addWidget(self.textBrowser)
        self.setLayout(layout)

        timer = QtCore.QTimer(self, interval=1000, timeout=self.print_out)
        timer.start()

    def print_out(self, string="Hello world!"):
        self.textBrowser.append(string + "\n\nanalyzing in ...\n {}".format('----' * self.i))
        self.i += 1


if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)
    myWin = Win()
    myWin.show()
    sys.exit(app.exec_())