how to make a button inactive in pyqt?

Question

The QMainWindow window contains the QTableView and QPushButton. Necessary :1 when the cell is highlighted, the button will be active setEnabled(True) I did this when connecting the signal . 2 how to do so that if you remove the cell selection, for example, to an empty place in the table, the button changes the mode to setEnabled(False)

import sys

from PyQt6.QtGui import QStandardItemModel, QStandardItem
from PyQt6.QtWidgets import QApplication, QPushButton, QTableView, QVBoxLayout, QWidget


class MyWindow(QWidget):
    def __init__(self):
        super(MyWindow, self).__init__()
        self.buttonEdit = QPushButton('Edit')
        self.qtable = QTableView()
        self.buttonEdit.setEnabled(False)

        data = [['1', '2', '3'],
                ['4', '5', '6'],
                ['7', '8', '9']]

        self.model = QStandardItemModel()

        for row in range(len(data)):
            for column in range(len(data[row])):
                item = QStandardItem(data[row][column])
                self.model.setItem(row, column, item)

        self.qtable.setModel(self.model)

        self.qtable.selectionModel().selectionChanged.connect(self.on_click)

        self.box = QVBoxLayout()
        self.box.addWidget(self.qtable)
        self.box.addWidget(self.buttonEdit)

        self.setLayout(self.box)

    def on_click(self):
        if self.qtable.selectionModel():
            self.buttonEdit.setEnabled(True)


if __name__ == '__main__':
    app = QApplication(sys.argv)

    main_window = MyWindow()
    main_window.resize(600, 800)

    main_window.show()
    sys.exit(app.exec())

Answer 1

def on_click:
    self.buttonEdit.setEnabled(self.qtable.selectionModel().hasSelection())

You should not need to check, if the selectionModel exists.
When the selectionModel has a selection, then the buttonEdit is enabled otherwise disabled.