[PyQt] QTreeWidgetItem - how to properly delete so tree.insertTopLevelItem(0, treeWidgetItem) works

[Taylor Carrasco]

My question is simple, I want to take the QTreeWidgetItems out of a tree,
and reinsert them in a specific order. So far with custom classes I've been
unable to succeed.
I tried below to build a simple example of my issue but it errors out when I
hit the "ReInsert" button, perhaps due to what I'm doing wrong, perhaps for
another reason I'm overlooking.

Unfortunately I can't figure out what I'm doing wrong on the "ReInserting"
of the items into the tree, but maybe it has to do with my question.





from PyQt4.QtCore import *
from PyQt4.QtGui import *

class MyItem(QTreeWidgetItem):
    def __init__(self, parent, text1=None, text2=None):
        QTreeWidgetItem.__init__(self, parent)

        self.text1 = text1
        self.text2 = text2
        self.setText(0, self.text1)
        self.setText(1, self.text2)

class MyTree(QTreeWidget):
    def __init__(self, parent):
        QTreeWidget.__init__(self, parent)
        self.itemList = []
        self.setColumnCount(3)

        for i in range(5):
            item = MyItem(self, text1='Initial Item', text2='Item #: ' +
str(i))

            # Always inserting at the top of the list
            self.insertTopLevelItem(0, item)
            self.itemList.append(item)
            print 'Item : ', str(item.text(0)) + ' : ' + str(item.text(1)),
' index: ', str(i)

class MyClass(QMainWindow):
    def __init__(self):
        QMainWindow.__init__(self)
        self.resize(600,400)

        # Central Widget
        self.layoutWidget = QWidget(self)
        self.setCentralWidget(self.layoutWidget)

        # Button
        self.btn = QPushButton(self.layoutWidget)
        self.btn.setText('ReInsert')
        self.btn.setGeometry(QRect(0,0,60,40))
        self.btn.setMinimumSize(QSize(60, 40))
        self.btn.setSizePolicy(QSizePolicy(QSizePolicy.Fixed,
QSizePolicy.Fixed))
        # Tree
        self.tree = MyTree(self.layoutWidget)
        # Layout
        self.lv_Main = QVBoxLayout(self.layoutWidget)
        self.lv_Main.addWidget(self.btn)
        self.lv_Main.addWidget(self.tree)
        # Connections
        self.connect(self.btn, SIGNAL('clicked()'), self.reinsertItems)

    def reinsertItems(self):
        tempItemList = []

        for i in range(self.tree.topLevelItemCount()):
            item = self.tree.takeTopLevelItem(i)
            tempItemList.append(item)

        # Just to print out the order of the list
        for item in tempItemList:
            print 'tempItemList Item index: ', item.text(1)

        print "All items removed, check Tree's Item count: ",
self.tree.topLevelItemCount()

        #for i in range(5):
        for item in tempItemList:
            self.tree.insertTopLevelItem(0, item)
            print 'Item : ', str(item.text(0)) + ' : ' + str(item.text(1))


app = QApplication([])
form = MyClass()
form.show()
app.exec_()
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