“Vista de árbol de Pyqt” Código de respuesta

Vista de árbol de Pyqt

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QTreeView
from PyQt5.Qt import QStandardItemModel, QStandardItem
from PyQt5.QtGui import QFont, QColor


class StandardItem(QStandardItem):
    def __init__(self, txt='', font_size=12, set_bold=False, color=QColor(0, 0, 0)):
        super().__init__()

        fnt = QFont('Open Sans', font_size)
        fnt.setBold(set_bold)

        self.setEditable(False)
        self.setForeground(color)
        self.setFont(fnt)
        self.setText(txt)


class AppDemo(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle('World Country Diagram')
        self.resize(500, 700)

        treeView = QTreeView()
        treeView.setHeaderHidden(True)

        treeModel = QStandardItemModel()
        rootNode = treeModel.invisibleRootItem()


        # America
        america = StandardItem('America', 16, set_bold=True)

        california = StandardItem('California', 14)
        america.appendRow(california)

        oakland = StandardItem('Oakland', 12, color=QColor(155, 0, 0))
        sanfrancisco = StandardItem('San Francisco', 12, color=QColor(155, 0, 0))
        sanjose = StandardItem('San Jose', 12, color=QColor(155, 0, 0))

        california.appendRow(oakland)
        california.appendRow(sanfrancisco)
        california.appendRow(sanjose)


        texas = StandardItem('Texas', 14)
        america.appendRow(texas)

        austin = StandardItem('Austin', 12, color=QColor(155, 0, 0))
        houston = StandardItem('Houston', 12, color=QColor(155, 0, 0))
        dallas = StandardItem('dallas', 12, color=QColor(155, 0, 0))

        texas.appendRow(austin)
        texas.appendRow(houston)
        texas.appendRow(dallas)


        # Canada 
        canada = StandardItem('America', 16, set_bold=True)

        alberta = StandardItem('Alberta', 14)
        bc = StandardItem('British Columbia', 14)
        ontario = StandardItem('Ontario', 14)
        canada.appendRows([alberta, bc, ontario])


        rootNode.appendRow(america)
        rootNode.appendRow(canada)

        treeView.setModel(treeModel)
        treeView.expandAll()
        treeView.doubleClicked.connect(self.getValue)

        self.setCentralWidget(treeView)

    def getValue(self, val):
        print(val.data())
        print(val.row())
        print(val.column())


app = QApplication(sys.argv)        

demo = AppDemo()
demo.show()

sys.exit(app.exec_())