PySide QTreeWidget的clear()导致崩溃
首先，我对Python和PySide还很陌生。
我有三个不同的QTreeWidget，它们分别代表三种不同的文件夹结构。当我尝试一次性清空这三个时，应用程序就崩溃了。
widgets = [ self.Delete_treeWidget01, self.Delete_treeWidget02, self.Delete_treeWidget03 ]
for widget in widgets:
widget.clear()
我也尝试过其他方法来清空它，比如说：
widgets = [ self.treeWidget01, self.treeWidget02, self.treeWidget03 ]
for widget in widgets:
aList = (range(widget.topLevelItemCount()))
for i in aList[::-1]:
widget.takeTopLevelItem(i)
但这样做也会导致崩溃。
我点击了“调试”，然后Visual Studio给了我这个信息：
在mayapy.exe中发生未处理的异常，地址为0x000000006E9D2C68（QtGui4.dll）： 0xC0000005：访问冲突，读取位置0xFFFFFFFFFFFFFFFF。
（这里提到maya是因为我在用Eclipse和Maya的Python解释器，因为我主要是为Maya编程。不过这次是独立的，跟Maya没有关系。）
我在QTreeWidgets所表示的层级中删除了一个文件夹，为了让它显示准确，我想先清空它，然后再重新填充。
我在网上搜索这个问题时，有人说这可能跟线程有关，但因为我对Python和PySide还不太熟悉，所以我甚至不知道怎么处理线程。
有没有人知道该怎么解决这个问题？
编辑：
代码如下：
import os
import sys
from PySide import QtGui, QtCore
from Toolbox_Test_UI import Ui_MirrorFolderCreation
from PySide.QtGui import QMainWindow, QApplication
class MainWindow( QMainWindow, Ui_MirrorFolderCreation ):
def __init__( self ):
super( MainWindow, self ).__init__()
self.setupUi( self )
# Connects the buttons
self.Delete_pushButton01.clicked.connect( lambda: self.folderDialog( 'delete1_dir' ) )
self.Delete_pushButton02.clicked.connect( lambda: self.folderDialog( 'delete2_dir' ) )
self.Delete_pushButton03.clicked.connect( lambda: self.folderDialog( 'delete3_dir' ) )
self.Delete_deletePushButton.clicked.connect( lambda: self.deleteFolders() )
self.Delete_populatePushButton.clicked.connect( lambda: self.populateTreeViews() )
self.Delete_treeWidget01.itemClicked.connect( lambda: self.findMirroredItem() )
# Change resize mode
headers = [self.Delete_treeWidget01.header(), self.Delete_treeWidget02.header(), self.Delete_treeWidget03.header()]
for head in headers:
head.setResizeMode( 0, QtGui.QHeaderView.ResizeToContents )
def findMirroredItem( self ):
''' find a item mirrored in widget 2 and 3 '''
#self.deselectTreeWidgetsItem()
widgets = [self.Delete_treeWidget02, self.Delete_treeWidget03]
for eachWidget in widgets:
self.selectMirroredItems(eachWidget)
def folderDialog( self, arg ):
''' Set lineEdits'''
dialog = QtGui.QFileDialog()
path = dialog.getExistingDirectory( self, "Select Folder", os.getcwd() )
if path:
if arg == 'delete1_dir':
self.Delete_lineEdit01.setText( path )
elif arg == 'delete2_dir':
self.Delete_lineEdit02.setText( path )
elif arg == 'delete3_dir':
self.Delete_lineEdit03.setText( path )
def populateTreeViews(self):
''' poplute the widgets'''
widgets = { self.Delete_treeWidget01:self.Delete_lineEdit01, self.Delete_treeWidget02:self.Delete_lineEdit02, self.Delete_treeWidget03:self.Delete_lineEdit03 }
for treeWidget, lineEdit in widgets.iteritems():
folderPath = lineEdit.text()
if folderPath:
treeWidget.clear()
self.populateTreeWidgetSearch( treeWidget, folderPath )
def populateTreeWidgetSearch( self, treeWidget, folderPath ):
rootTreeView = None
def searchFolder( folder, rootTreeView ):
folders = os.listdir( folder )
for eachSubFolder in folders:
childFolder = os.path.join( folder, eachSubFolder )
if os.path.isdir( childFolder ):
if rootTreeView is None:
rootTreeView = treeWidget.invisibleRootItem()
item = QtGui.QTreeWidgetItem( rootTreeView )
item.setText( 0, eachSubFolder )
item.setExpanded( True )
item.parent()
treeWidget.addTopLevelItem( item )
if os.listdir( childFolder ):
searchFolder( childFolder, item )
if folderPath:
searchFolder( folderPath, rootTreeView )
def deleteFolders( self ):
def countFolder( folder):
folders = os.listdir( folder )
for eachSubFolder in folders:
eachSubFolder = os.path.join( folder, eachSubFolder )
if os.path.isdir( eachSubFolder ):
self.foIndex += 1
if os.listdir( eachSubFolder ):
countFolder( eachSubFolder)
else:
self.fiIndex += 1
def findFolders():
folderPath = []
widgets = {self.Delete_treeWidget01:self.Delete_lineEdit01, self.Delete_treeWidget02:self.Delete_lineEdit02, self.Delete_treeWidget03:self.Delete_lineEdit03}
for treeWidget, lineEdit in widgets.iteritems():
selectedItems = treeWidget.selectedItems()
for item in selectedItems:
basePath = lineEdit.text()
if basePath:
treeWidgetHierarchy = self.getTreePath( item )
folderPath.append( os.path.join( basePath, treeWidgetHierarchy ) )
return folderPath
infoDict = []
for eachFolder in findFolders():
self.fiIndex = 0
self.foIndex = 0
countFolder( eachFolder)
infoDict.append({'deletionFolder':eachFolder, 'files':self.fiIndex, 'folders':self.foIndex})
self.populateTreeViews()
def deselectTreeWidgetsItem(self):
# Deselect everything from previews selection
widgets = [self.Delete_treeWidget02, self.Delete_treeWidget03]
for eachWidget in widgets:
for eachSel in eachWidget.selectedItems():
eachSel.setSelected( False )
def selectMirroredItems(self, widget):
# Get selected item
item = self.Delete_treeWidget01.selectedItems()[0]
# Path to the selected item
itemChilds = self.getTreePath( item )
# Find all top items to iterate through
topItems = widget.findItems( itemChilds.split( '/' )[0],QtCore.Qt.MatchExactly,0 )
# Default state of variables
itemFound = None
listCheck = []
index = 1
if topItems:
TreeWidgetItems = QtGui.QTreeWidgetItemIterator( topItems[0] )
TreeWidgetItemList = self.remakeList( TreeWidgetItems )
for child in itemChilds.split( '/' ):
index = index + 1
for item in TreeWidgetItemList:
itemlist = self.getTreePath( item )
if child == item.text( 0 ):
listCheck.append( item.text( 0 ))
if ( itemlist in itemChilds ) and ( len( itemChilds.split('/')) < index ):
itemFound = item
if itemFound:
widget.scrollToItem(itemFound)
itemFound.setSelected( True )
def remakeList(self, treeWidgetList):
itemList = []
for it in treeWidgetList:
itemList.append(it.value())
return itemList
def getTreePath( self, item ):
path = []
while item is not None:
path.append( str( item.text( 0 )))
item = item.parent()
return '/'.join( reversed( path ))
if __name__ == '__main__':
app = QApplication( sys.argv )
frame = MainWindow()
frame.show()
app.exec_()
窗口：
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'C:/Users/stmahe1/GoogleDrive_Group3/TA_SpaceShooter/scripts/WIP/mattias/PipelineToolbox/Mirror/ui/Toolbox_Test.ui'
#
# Created: Tue Apr 08 13:19:23 2014
# by: pyside-uic 0.2.15 running on PySide 1.2.1
#
# WARNING! All changes made in this file will be lost!
from PySide import QtCore, QtGui
class Ui_MirrorFolderCreation(object):
def setupUi(self, MirrorFolderCreation):
MirrorFolderCreation.setObjectName("MirrorFolderCreation")
MirrorFolderCreation.resize(807, 626)
self.centralwidget = QtGui.QWidget(MirrorFolderCreation)
self.centralwidget.setObjectName("centralwidget")
self.verticalLayout_8 = QtGui.QVBoxLayout(self.centralwidget)
self.verticalLayout_8.setObjectName("verticalLayout_8")
self.verticalLayout_4 = QtGui.QVBoxLayout()
self.verticalLayout_4.setObjectName("verticalLayout_4")
self.label_6 = QtGui.QLabel(self.centralwidget)
font = QtGui.QFont()
font.setFamily("Orator Std")
font.setPointSize(11)
font.setWeight(75)
font.setBold(True)
self.label_6.setFont(font)
self.label_6.setObjectName("label_6")
self.verticalLayout_4.addWidget(self.label_6)
self.horizontalLayout_4 = QtGui.QHBoxLayout()
self.horizontalLayout_4.setObjectName("horizontalLayout_4")
self.verticalLayout_6 = QtGui.QVBoxLayout()
self.verticalLayout_6.setObjectName("verticalLayout_6")
self.horizontalLayout_20 = QtGui.QHBoxLayout()
self.horizontalLayout_20.setObjectName("horizontalLayout_20")
self.Delete_lineEdit01 = QtGui.QLineEdit(self.centralwidget)
self.Delete_lineEdit01.setObjectName("Delete_lineEdit01")
self.horizontalLayout_20.addWidget(self.Delete_lineEdit01)
self.Delete_pushButton01 = QtGui.QPushButton(self.centralwidget)
self.Delete_pushButton01.setMaximumSize(QtCore.QSize(30, 16777215))
self.Delete_pushButton01.setObjectName("Delete_pushButton01")
self.horizontalLayout_20.addWidget(self.Delete_pushButton01)
self.verticalLayout_6.addLayout(self.horizontalLayout_20)
self.Delete_treeWidget01 = QtGui.QTreeWidget(self.centralwidget)
self.Delete_treeWidget01.setEnabled(True)
self.Delete_treeWidget01.setObjectName("Delete_treeWidget01")
self.Delete_treeWidget01.header().setVisible(False)
self.Delete_treeWidget01.header().setStretchLastSection(False)
self.verticalLayout_6.addWidget(self.Delete_treeWidget01)
self.horizontalLayout_4.addLayout(self.verticalLayout_6)
self.verticalLayout_5 = QtGui.QVBoxLayout()
self.verticalLayout_5.setObjectName("verticalLayout_5")
self.horizontalLayout_19 = QtGui.QHBoxLayout()
self.horizontalLayout_19.setObjectName("horizontalLayout_19")
self.Delete_lineEdit02 = QtGui.QLineEdit(self.centralwidget)
self.Delete_lineEdit02.setObjectName("Delete_lineEdit02")
self.horizontalLayout_19.addWidget(self.Delete_lineEdit02)
self.Delete_pushButton02 = QtGui.QPushButton(self.centralwidget)
self.Delete_pushButton02.setMaximumSize(QtCore.QSize(30, 16777215))
self.Delete_pushButton02.setObjectName("Delete_pushButton02")
self.horizontalLayout_19.addWidget(self.Delete_pushButton02)
self.verticalLayout_5.addLayout(self.horizontalLayout_19)
self.Delete_treeWidget02 = QtGui.QTreeWidget(self.centralwidget)
self.Delete_treeWidget02.setObjectName("Delete_treeWidget02")
self.Delete_treeWidget02.headerItem().setText(0, "1")
self.Delete_treeWidget02.header().setVisible(False)
self.Delete_treeWidget02.header().setStretchLastSection(False)
self.verticalLayout_5.addWidget(self.Delete_treeWidget02)
self.horizontalLayout_4.addLayout(self.verticalLayout_5)
self.verticalLayout_7 = QtGui.QVBoxLayout()
self.verticalLayout_7.setObjectName("verticalLayout_7")
self.horizontalLayout_21 = QtGui.QHBoxLayout()
self.horizontalLayout_21.setObjectName("horizontalLayout_21")
self.Delete_lineEdit03 = QtGui.QLineEdit(self.centralwidget)
self.Delete_lineEdit03.setObjectName("Delete_lineEdit03")
self.horizontalLayout_21.addWidget(self.Delete_lineEdit03)
self.Delete_pushButton03 = QtGui.QPushButton(self.centralwidget)
self.Delete_pushButton03.setMaximumSize(QtCore.QSize(30, 16777215))
self.Delete_pushButton03.setObjectName("Delete_pushButton03")
self.horizontalLayout_21.addWidget(self.Delete_pushButton03)
self.verticalLayout_7.addLayout(self.horizontalLayout_21)
self.Delete_treeWidget03 = QtGui.QTreeWidget(self.centralwidget)
self.Delete_treeWidget03.setObjectName("Delete_treeWidget03")
self.Delete_treeWidget03.headerItem().setText(0, "1")
self.Delete_treeWidget03.header().setVisible(False)
self.verticalLayout_7.addWidget(self.Delete_treeWidget03)
self.horizontalLayout_4.addLayout(self.verticalLayout_7)
self.verticalLayout_4.addLayout(self.horizontalLayout_4)
self.horizontalLayout_5 = QtGui.QHBoxLayout()
self.horizontalLayout_5.setObjectName("horizontalLayout_5")
self.Delete_populatePushButton = QtGui.QPushButton(self.centralwidget)
self.Delete_populatePushButton.setObjectName("Delete_populatePushButton")
self.horizontalLayout_5.addWidget(self.Delete_populatePushButton)
spacerItem = QtGui.QSpacerItem(20, 20, QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Minimum)
self.horizontalLayout_5.addItem(spacerItem)
self.Delete_deletePushButton = QtGui.QPushButton(self.centralwidget)
self.Delete_deletePushButton.setObjectName("Delete_deletePushButton")
self.horizontalLayout_5.addWidget(self.Delete_deletePushButton)
self.verticalLayout_4.addLayout(self.horizontalLayout_5)
self.verticalLayout_8.addLayout(self.verticalLayout_4)
self.gridLayout_4 = QtGui.QGridLayout()
self.gridLayout_4.setObjectName("gridLayout_4")
self.verticalLayout_8.addLayout(self.gridLayout_4)
MirrorFolderCreation.setCentralWidget(self.centralwidget)
self.actionExit = QtGui.QAction(MirrorFolderCreation)
self.actionExit.setObjectName("actionExit")
self.actionLoad_preset = QtGui.QAction(MirrorFolderCreation)
self.actionLoad_preset.setObjectName("actionLoad_preset")
self.actionSave_Preset = QtGui.QAction(MirrorFolderCreation)
self.actionSave_Preset.setObjectName("actionSave_Preset")
self.retranslateUi(MirrorFolderCreation)
QtCore.QMetaObject.connectSlotsByName(MirrorFolderCreation)
MirrorFolderCreation.setTabOrder(self.Delete_lineEdit01, self.Delete_lineEdit02)
MirrorFolderCreation.setTabOrder(self.Delete_lineEdit02, self.Delete_lineEdit03)
MirrorFolderCreation.setTabOrder(self.Delete_lineEdit03, self.Delete_pushButton01)
MirrorFolderCreation.setTabOrder(self.Delete_pushButton01, self.Delete_pushButton02)
MirrorFolderCreation.setTabOrder(self.Delete_pushButton02, self.Delete_pushButton03)
MirrorFolderCreation.setTabOrder(self.Delete_pushButton03, self.Delete_populatePushButton)
MirrorFolderCreation.setTabOrder(self.Delete_populatePushButton, self.Delete_deletePushButton)
MirrorFolderCreation.setTabOrder(self.Delete_deletePushButton, self.Delete_treeWidget01)
MirrorFolderCreation.setTabOrder(self.Delete_treeWidget01, self.Delete_treeWidget02)
MirrorFolderCreation.setTabOrder(self.Delete_treeWidget02, self.Delete_treeWidget03)
def retranslateUi(self, MirrorFolderCreation):
MirrorFolderCreation.setWindowTitle(QtGui.QApplication.translate("MirrorFolderCreation", "Technical Artist Toolbox", None, QtGui.QApplication.UnicodeUTF8))
self.label_6.setText(QtGui.QApplication.translate("MirrorFolderCreation", "Mirrored Deletion of Folders", None, QtGui.QApplication.UnicodeUTF8))
self.Delete_pushButton01.setText(QtGui.QApplication.translate("MirrorFolderCreation", "...", None, QtGui.QApplication.UnicodeUTF8))
self.Delete_pushButton02.setText(QtGui.QApplication.translate("MirrorFolderCreation", "...", None, QtGui.QApplication.UnicodeUTF8))
self.Delete_pushButton03.setText(QtGui.QApplication.translate("MirrorFolderCreation", "...", None, QtGui.QApplication.UnicodeUTF8))
self.Delete_populatePushButton.setText(QtGui.QApplication.translate("MirrorFolderCreation", "Update", None, QtGui.QApplication.UnicodeUTF8))
self.Delete_deletePushButton.setText(QtGui.QApplication.translate("MirrorFolderCreation", "Delete", None, QtGui.QApplication.UnicodeUTF8))
self.actionExit.setText(QtGui.QApplication.translate("MirrorFolderCreation", "Exit", None, QtGui.QApplication.UnicodeUTF8))
self.actionLoad_preset.setText(QtGui.QApplication.translate("MirrorFolderCreation", "Load Preset", None, QtGui.QApplication.UnicodeUTF8))
self.actionSave_Preset.setText(QtGui.QApplication.translate("MirrorFolderCreation", "Save Preset", None, QtGui.QApplication.UnicodeUTF8))
经过进一步测试，可能是因为我在这些控件中选中了某些东西，（我发现如果不运行findMirroredItem()，它就能正常工作），但即使我先取消选择所有内容，这也没有帮助。
如果我点击第一个控件，它会尝试在其他两个控件中选择一个类似的对象。如果我不点击第一个控件，我可以随意重新加载/填充它，程序不会崩溃。如果我之前选中了某个东西，尝试重新加载/填充时最终会崩溃。
1 个回答
3
这个问题似乎是因为在使用 QTreeWidgetItemIterator 时，传入 QTreeWidgetItem 作为第一个参数导致的一个 PySide 的 bug。当把 QTreeWidget 作为第一个参数时，这个问题就消失了。这个 bug 在相应的 PyQt4 代码中不会出现。
可以通过修改 selectMirroredItems 中的以下一行来修复示例代码：
# TreeWidgetItems = QtGui.QTreeWidgetItemIterator( topItems[0] )
TreeWidgetItems = QtGui.QTreeWidgetItemIterator(widget)
似乎仅仅遍历 QTreeWidgetItemIterator 就足以导致程序崩溃（虽然我没有费心去创建一个最小的测试案例）。
如果发现 PySide 的 bug，可以在 这里 报告。