从Pandas数据框中填充QTableView的最快方法 [英] Fastest way to populate QTableView from Pandas data frame

问题描述

我是PyQt的新手，我正在努力填充QTableView控件.

I'm very new to PyQt and I am struggling to populate a QTableView control.

我的代码如下:

def data_frame_to_ui(self, data_frame):
        """
        Displays a pandas data frame into the GUI
        """
        list_model = QtGui.QStandardItemModel()
        i = 0
        for val in data_frame.columns:
            # for the list model
            if i > 0:
                item = QtGui.QStandardItem(val)
                #item.setCheckable(True)
                item.setEditable(False)
                list_model.appendRow(item)
            i += 1
        self.ui.profilesListView.setModel(list_model)

        # for the table model
        table_model = QtGui.QStandardItemModel()

        # set table headers
        table_model.setColumnCount(data_frame.columns.size)
        table_model.setHorizontalHeaderLabels(data_frame.columns.tolist())
        self.ui.profileTableView.horizontalHeader().setStretchLastSection(True)

        # fill table model data
        for row_idx in range(10): #len(data_frame.values)
            row = list()
            for col_idx in range(data_frame.columns.size):
                val = QtGui.QStandardItem(str(data_frame.values[row_idx][col_idx]))
                row.append(val)
            table_model.appendRow(row)

        # set table model to table object
        self.ui.profileTableView.setModel(table_model)

实际上，我在代码中成功填充了QListView，但是未显示我设置为QTableView的值，您还可以看到我将行截断为10，因为它永远需要显示数百行数据框架.

Actually in the code I succeed to populate a QListView, but the values I set to the QTableView are not displayed, also you can see that I truncated the rows to 10 because it takes forever to display the hundreds of rows of the data frame.

那么，从熊猫数据框中填充表格模型的最快方法是什么?

So, What is the fastest way to populate the table model from a pandas data frame?

谢谢.

推荐答案

我个人将创建自己的模型类以使其处理起来更容易.

Personally I would just create my own model class to make handling it somewhat easier.

例如:

import sys
from PyQt4 import QtCore, QtGui
Qt = QtCore.Qt

class PandasModel(QtCore.QAbstractTableModel):
    def __init__(self, data, parent=None):
        QtCore.QAbstractTableModel.__init__(self, parent)
        self._data = data

    def rowCount(self, parent=None):
        return len(self._data.values)

    def columnCount(self, parent=None):
        return self._data.columns.size

    def data(self, index, role=Qt.DisplayRole):
        if index.isValid():
            if role == Qt.DisplayRole:
                return QtCore.QVariant(str(
                    self._data.values[index.row()][index.column()]))
        return QtCore.QVariant()


if __name__ == '__main__':
    application = QtGui.QApplication(sys.argv)
    view = QtGui.QTableView()
    model = PandasModel(your_pandas_data)
    view.setModel(model)

    view.show()
    sys.exit(application.exec_())

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