Python PyQt5 QTreeWidget子项

Question

如何在QTreeWidget中创建子项目？
我能够创建顶级项目（在下面列出），但仍然在寻找子项目。
PyQt-＆GT; 5.6
Python-＆GT; 3.5
Spyder-＆GT; 3.0.2

import sys
from PyQt5.QtWidgets import QTreeWidget, QTreeWidgetItem, QApplication, QWidget

if __name__ == '__main__':
    app = 0
    if QApplication.instance() != None:
        app = QApplication.instance()
    else:    
        app = QApplication(sys.argv)    

    l1 = QTreeWidgetItem([ "String A",  "String B",  "String C" ])
    l2 = QTreeWidgetItem([ "String AA", "String BB", "String CC" ])

    w = QWidget()
    w.resize(510,210)

    tw = QTreeWidget(w)
    tw.resize(500,200)
    tw.setColumnCount(3)
    tw.setHeaderLabels(["Column 1", "Column 2", "Column 3"])
    tw.addTopLevelItem(l1)
    tw.addTopLevelItem(l2)

    w.show()
    app.exec_()

Answer 1

使用{your QTreeWidgetItem}.addChild(child QTreeWidgetItem)

在我的例子中：

import sys
from PyQt5.QtWidgets import QTreeWidget, QTreeWidgetItem, QApplication, QWidget

if __name__ == '__main__':
    app = 0
    if QApplication.instance():
        app = QApplication.instance()
    else:
        app = QApplication(sys.argv)

    l1 = QTreeWidgetItem(["String A", "String B", "String C"])
    l2 = QTreeWidgetItem(["String AA", "String BB", "String CC"])

    for i in range(3):
        l1_child = QTreeWidgetItem(["Child A" + str(i), "Child B" + str(i), "Child C" + str(i)])
        l1.addChild(l1_child)

    for j in range(2):
        l2_child = QTreeWidgetItem(["Child AA" + str(j), "Child BB" + str(j), "Child CC" + str(j)])
        l2.addChild(l2_child)

    w = QWidget()
    w.resize(510, 210)

    tw = QTreeWidget(w)
    tw.resize(500, 200)
    tw.setColumnCount(3)
    tw.setHeaderLabels(["Column 1", "Column 2", "Column 3"])
    tw.addTopLevelItem(l1)
    tw.addTopLevelItem(l2)

    w.show()
    sys.exit(app.exec_())