PyQt CheckBox检查QTableWidget无法正常工作

Question

我试图用python读取PyQt QTableWidget中复选框的checkstate，但当我点击复选框时，我看到它正在改变，但我的代码没有。这是我正在使用的代码。有什么想法吗？

class MyWindowClass(QtGui.QMainWindow, window):
    def __init__(self, parent=None):
        QtGui.QMainWindow.__init__(self, parent)
        self.load_table()

    def load_table(self):
        """Fill table with data from results"""
        self.todoTable.clear()
        result = [(0, "name", "Desc", "2014-12-07", "1"), (1, "name", "desc", "2014-12-08", "0")]
        self.todoTable.setRowCount(result.__len__())
        self.todoTable.setColumnCount(4)
        self.todoTable.setHorizontalHeaderLabels(["State", "Date", "Name", "Description"])
        for i in range(result.__len__()):
            self.todoTable.setItem(i, 2, QtGui.QTableWidgetItem(result[i][1]))
            self.todoTable.setItem(i, 3, QtGui.QTableWidgetItem(result[i][2]))
            self.todoTable.setItem(i, 1, QtGui.QTableWidgetItem(result[i][3].__str__()))
            checkItem = QtGui.QTableWidgetItem()
            if int(result[i][4]) == 2:
                checkItem.setCheckState(QtCore.Qt.Checked)
                checkItem.setText("")
            else:
                checkItem.setCheckState(QtCore.Qt.Unchecked)
                checkItem.setText("")
            self.todoTable.setItem(i, 0, checkItem)
        self.todoTable.resizeColumnsToContents()
        self.todoTable.itemChanged.connect(self.item_changed)

    def item_changed(self, item):
            row = item.row()
            state = item.checkState()
            print("Current state is: {}".format(state))
            print("we're now at item in row: {}".format(row))
            if state == 2:
                print("set checked")
            elif state == 0:
                print("set unchecked")
            else:
                print("Something is not working fine here")

更新：修复了代码，更新后反映了更改