Python PyQt5 QTreeWidget子项目

Question

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

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_())