tree_widget_example.py

from PySide import QtGui, QtCore
from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
import matplotlib.pyplot as plt
import pandas as pd
import numpy as np
import datetime

IRIS_PATH = "/home/anuj/Dropbox/work/work/Project/access"


treename = {
		'General Statistics' : ['Summary'],
		'Activity Statistics': ['Daily', 'By Hour Of Day', 'By Day Of Week', 'By Week', 'By Month'],
		'Access Statistics' : ['Pages','Files','Images','Others','Search Engines'],
		'Referrers' : ['Reffering Sites', 'Reffering Urls', 'File Types'],
		'Errors' : [ 'Types', '404 Errors', 'Other Errors', 'Status Codes'],
		'Tracked Files' : ['Summary']
		}


class QCanvas(FigureCanvas):
    def __init__(self, figure, parent):
        super(QCanvas, self).__init__(figure)
        self.setParent(parent)

    def redrawAxes(self):
        pass


class DataFrameModel(QtCore.QAbstractTableModel):

    def __init__(self, df=None):
        self.df = df
        super(DataFrameModel, self).__init__()

    def data(self, index, role):
        if role == QtCore.Qt.DisplayRole:
            return str(self.df.iget_value(index.row(), index.column()))
        return None

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

    def rowCount(self, parent):
        return self.df.shape[0]

    def columnCount(self, parent):
        return self.df.shape[1]


class MainWindow(QtGui.QMainWindow):
    def __init__(self, **kwargs):
        super(MainWindow, self).__init__(**kwargs)

        centralWidget = QtGui.QSplitter(self)
        layout = QtGui.QHBoxLayout()

        data = pd.read_csv(IRIS_PATH, sep=' ', names=['timestamp','duration','ip','result','bytes','reqmthd','url','rfc','hierarchy', 'type'])
	data['timestamp']= map(datetime.datetime.fromtimestamp, data['timestamp'])
	data.index=pd.to_datetime(data.pop('timestamp'))
	self.data=data

        treeWidget = QtGui.QTreeWidget(self)
	treeWidget.headerItem().setText(0, "Contents")
	i=0
        for parent, children in treename.iteritems():
            rowItem = QtGui.QTreeWidgetItem(treeWidget, str(parent))
            rowItem.setText(0, parent)
	    for child in children:
		    childItem= QtGui.QTreeWidgetItem(rowItem)
		    childItem.setText(0, str(child))
		    rowItem.addChild(childItem)
            treeWidget.insertTopLevelItem(i, rowItem)
	    i+1
        treeWidget.itemSelectionChanged.connect(self.redrawPlot)
        self.treeWidget = treeWidget

        layout.addWidget(self.treeWidget)

        tabbedArea = QtGui.QTabWidget(self)
        self.fig, self.ax = self.get_example_figure()
        self.mpl_tab = QCanvas(self.fig, self)
        self.tableView = QtGui.QTableView(self)
        self.dataFrameModel = DataFrameModel(self.data)
        self.tableView.setModel(self.dataFrameModel)
        tabbedArea.addTab(self.mpl_tab, "Visualization")
        tabbedArea.addTab(self.tableView, "Data")

        layout.addWidget(tabbedArea)


        centralWidget.setLayout(layout)
        self.setCentralWidget(centralWidget)

    def get_example_figure(self):
        x = np.linspace(-2*np.pi, 2*np.pi, 1000)
        y = np.sin(x)
        fig = plt.figure()
        ax = fig.add_subplot(111)
        ax.hold(False)
        ax.plot(x, y)
        self.x = x
        return fig, ax

    def redrawPlot(self):
        selection = self.treeWidget.selectedItems()
        kind = selection[0].text(0)
        if kind == "Summary":
            self.ax.plot(self.x, self.x)
        elif kind == "Daily":
            self.ax.plot(self.x, np.sin(self.x))
        else:
	    self.ax.plot(self.x, np.sin(self.x))
        self.ax.figure.canvas.draw()


if __name__ == "__main__":
    import sys
    app = QtGui.QApplication(sys.argv)
    window = MainWindow()
    window.show()
    sys.exit(app.exec_())

whats wrong with this?

What is the error?

line 28, in init
self.treeWidget.insertTopLevelItem(str(parent), rowItem)
TypeError: 'PySide.QtGui.QTreeWidget.insertTopLevelItem' called with wrong argument types:
PySide.QtGui.QTreeWidget.insertTopLevelItem(str, PySide.QtGui.QTreeWidgetItem)
Supported signatures:
PySide.QtGui.QTreeWidget.insertTopLevelItem(int, PySide.QtGui.QTreeWidgetItem)

In line 28 the first element should be an integer, index of that element in the tree widget.