QAbstractTabelModel.data() 总是得到 index.row() == 0

Question

我已经定义我的自定义QAbstrtactTableModelPython和实施columnCount()，rowCount()，data()和headerData()和也加入到一个函数add()新条目：

import sys

from PySide2.QtUiTools import QUiLoader

from PySide2.QtWidgets import QApplication, QMainWindow

from PySide2.QtCore import QFile, QProcess, Signal,\

    Slot, QObject, QThread, Qt, QAbstractTableModel, QModelIndex,\

    QTimer

import random

class TableModel(QAbstractTableModel):

    def __init__(self, values):

        QAbstractTableModel.__init__(self)

        self.values = values

    def columnCount(self, parent=QModelIndex()):

        return 2

    def rowCount(self, parent=QModelIndex()):

        return len(self.values)

    def data(self, index, role=Qt.DisplayRole):

        print("called")

        if 0 <= index.row() < self.rowCount() and 0 <= index.column() < self.columnCount():

            if role == Qt.DisplayRole:

                print(index.row())

                if index.column() == 0:

                    return list(self.values.keys())[index.row()]

                else:

                    return self.values[list(self.values.keys())[index.row()]]

    def add(self, data):

        self.values[data[0]] = data[1]

    def headerData(self, section, orientation, role=Qt.DisplayRole):

        if role == Qt.DisplayRole:

            if orientation == Qt.Horizontal:

                if section == 0:

                    return "Parking,Meter"

                elif section == 1:

                    return "Revenue"

class Monitor(QObject):

    data_batch_ready = Signal(list)

    def __init__(self, parent=None):

        super(Monitor, self).__init__(parent)

    @Slot(list)

    def fill_batch(self):

        my_data = []

        for parking in range(4):

            for index in range(10):

                my_data.append([str(parking)+","+str(index), random.randint(1,101)])

        self.data_batch_ready.emit(my_data)

数据是一个 python 字典，通过调用随机函数进行修改，该函数每 1 秒用 1 个条目填充字典，如下所示：

"0,0":[随机值]

"0,1":[随机值]

"0,2":[随机值]

"1,0":[随机值]

"1,1":[随机值]

"1,2":[随机值]

rowCount()正确反映数据中的行数values，但tableView始终只显示 1 行，并且data()仅请求index.row() == 0