问如何删除在PyQt5的另一个函数中添加的QPushButton？

EN

    def add_image(self, button_index):
    try:
        file_path = QFileDialog.getOpenFileName(self, 'Open Image', '*.jpg')
    except FileNotFoundError:
        self.status_bar.showMessage('The path {} is not valid'.format(file_path))
    else:
        if file_path[0] != '':

            new_image=QPixmap(file_path[0]).scaled(self.image_height,self.image_width)

            self.image_label_list[button_index].setPixmap(new_image)
            self.button_list[button_index].setText('Remove')
            self.status_bar.showMessage(
                'Image {} was added successfully!'.format(get_name_from_path(file_path[0]))
            )

            if self.button_layout_list[button_index].count() > 1:
                delete_button = type(PyQt5.QtWidgets.QPushButton)(self.button_layout_list[button_index].itemAt(1))



                delete_button.deleteLater()

                self.button_layout_list[button_index].removeWidget(self.button_layout_list[button_index].itemAt(1))
                print('number of items: {}'.format(self.button_layout_list[button_index].count()))

            if (button_index - (len(self.button_list) - 1)) == 0:
                empty_image_layout = QVBoxLayout()
                button_box_layout = QHBoxLayout()

                empty_pic_label = QLabel()
                empty_pic = QPixmap('empty p.png').scaled(self.image_height, self.image_width)
                empty_pic_label.setPixmap(empty_pic)

                add_button = QPushButton('Add')
                # add_button.setFixedWidth(self.image_width)
                add_button.clicked.connect(self.on_click)
                button_box_layout.addWidget(add_button)

                empty_image_layout.addWidget(empty_pic_label)
                empty_image_layout.addLayout(button_box_layout)

                item = self.image_box.itemAt(self.stretch_index)

                self.image_box.removeItem(item)
                self.image_box.addLayout(empty_image_layout)
                self.image_box.addStretch()
                self.stretch_index += 1

                # Book keeping
                self.image_layout_list.append(empty_image_layout)
                self.button_layout_list.append(button_box_layout)
                self.image_label_list.append(empty_pic_label)
                self.button_list.append(add_button)

def remove_image(self, button_id, button_index):
    image_label = self.image_label_list[button_index]
    image_label.setPixmap(self.empty_pic)
    button_id.setText('Add')
    delete_button = QPushButton('Delete')
    print(type(delete_button))
    print(self.button_layout_list[button_index].count())
    self.button_layout_list[button_index].addWidget(delete_button)