Why clone?

Question

Python

I set a timer to update the table, when you click on the checkbox, in the console it gives out as many copies as the table has been updated, how to make it give out one copy when clicked. Thanks

from PyQt5.QtCore import QTimer, QTime
from PyQt5.QtWidgets import QApplication, QTableWidgetItem, QTableWidget, QHBoxLayout, QWidget


class App(QWidget):

    def __init__(self):
        super().__init__()
        self.thread = None

        self.layout = QHBoxLayout(self)
        self.layout.setSpacing(0)

        self.table = QTableWidget(self)
        self.layout.addWidget(self.table)

        self.table.setColumnCount(5)
        self.table.setRowCount(5)

        self.timer = QTimer()
        self.timer.timeout.connect(self.row)
        self.timer.start(5000)

    def row(self):
        time = QTime.currentTime()
        text = time.toString('mm:ss')
        print("update table...." + time.toString('mm:ss'))

        for row in range(5):
            item_0 = QTableWidgetItem()
            item_0.setText(text)
            self.table.setItem(row, 0, item_0)

            item_1 = QTableWidgetItem()
            item_1.setText(text)
            self.table.setItem(row, 1, item_1)

            item_2 = QTableWidgetItem()
            item_2.setText(text)
            self.table.setItem(row, 2, item_2)

            item_3 = QTableWidgetItem()
            item_3.setText(text)
            item_3.setCheckState(0)
            self.table.setItem(row, 3, item_3)

        self.table.itemClicked.connect(self.item_clicked)

    def item_clicked(self, item):
        obj = self.table.item(item.row(), 1)
        print(obj.text(), item.checkState())


if __name__ == '__main__':
    qApp = QApplication([])
    app = App()
    app.resize(600, 200)
    app.show()
    qApp.exec()