import sys

import pandas as pd
from PyQt5.QtCore import QAbstractTableModel, Qt
from PyQt5.QtWidgets import QMainWindow, QTableView, QApplication


class TableModel(QAbstractTableModel):

    def __init__(self, data):
        super(TableModel, self).__init__()
        self._data = data

    def data(self, index, role):
        if role == Qt.DisplayRole:
            value = self._data.iloc[index.row(), index.column()]
            return str(value)

    def rowCount(self, index):
        return self._data.shape[0]

    def columnCount(self, index):
        return self._data.shape[1]

    def headerData(self, section, orientation, role):
        if role == Qt.DisplayRole:
            if orientation == Qt.Horizontal:
                return str(self._data.columns[section])
            if orientation == Qt.Vertical:
                return str(self._data.index[section])


class MainWindow(QMainWindow):

    def __init__(self):
        super().__init__()

        self.table = QTableView()

        data = pd.DataFrame(
            [
                [1, 9, 2],
                [4, 0, -1],
                [7, 8, 9],
                [3, 3, 2],
                [5, 8, 9],
            ],
            columns=['a', 'b', 'c'],
            index=['Row 1', 'Row 2', 'Row 3', 'Row 4', 'Row 5'],
        )

        self.model = TableModel(data)
        self.table.setModel(self.model)

        self.setCentralWidget(self.table)
        self.setGeometry(600, 100, 400, 200)


app = QApplication(sys.argv)
window = MainWindow()
window.show()
sys.exit(app.exec_())