Python .@Кццццццццццццццццц。您发布的示例应该以某种方式工作，或者被您必须描述的错误打断。您在这个问题中给出的示例错误地崩溃了AttributeError:“HelloApplication”对象没有属性“show\u hide\u CKInL

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.@Кццццццццццццццццц。您发布的示例应该以某种方式工作，或者被您必须描述的错误打断。您在这个问题中给出的示例错误地崩溃了

AttributeError:“HelloApplication”对象没有属性“show\u hide\u CKInListView

。您真的认为我需要打开一个新问题吗？我希望在这个门户上进行对话。我改变了这个例子。show_hide_ckeckinlistView是一个函数，用于从ListView中删除所有复选框，并以新形式切换和恢复所有选定元素。现在代码不会产生错误，但它不能满足我的需要。也许你能帮上忙？@如果你有一个新问题，那么创建一个新帖子；如果你想聊天，那么如果你有足够的声誉，那么使用聊天：

#!/usr/bin/python
# coding=utf-8

headline = """ 
###############################################################################
#                                   Program                                   #
#            a small ListView application in PyQt5 (Python 3.7)               #
###############################################################################
All comments are in two languages (Russian, English)
Все комментарии на двух языках (русский, английский)
"""

import sys
import random
from PyQt5 import QtWidgets, QtGui, QtCore, Qt

class HelloApplication(QtWidgets.QApplication):
    def __init__(self, args):
        """
            In the constructor, we do everything that is necessary to run our application, which
            creates a QApplication in the __init__ method, then adds our widgets and finally
            runs exec_loop
            В конструкторе мы делаем всё, что необходимо для запуска нашего приложения, которое
            создаёт QApplication в __init__ методе, затем добавляет наши виджеты и, наконец,
            запускает exec_loop
        """
        QtWidgets.QApplication.__init__(self,args)
        self.addWidgets()

    def addWidgets(self):

    # Create widgets
    # Создание виджетов
        self.checkCalc=0
        self.StartList=[]
        self.BaseWidget=QtWidgets.QWidget()
        self.BaseWidget.setWindowTitle('Example List')
        self.grid = QtWidgets.QGridLayout()
        self.verCombo = QtWidgets.QComboBox()
        self.listView=QtWidgets.QListView()
        self.listViewmodel = QtGui.QStandardItemModel(self.listView)
        self.listView.setModel(self.listViewmodel)

    # Setting options for widgets (placement, size)
    # Установка параметров для виджетов (размещение, размеры)
        self.listView.setModelColumn(2)
        self.grid.addWidget(self.verCombo,0,0,1,3)
        self.grid.addWidget(self.listView, 2, 0, 3, 3)

    # Setting actions for widgets
    # Установка действий для виджетов
        self.listView.clicked[QtCore.QModelIndex].connect(self.on_clicked)
        self.verCombo.activated[str].connect(self.onverComboActivated)

    # Setting statuses, texts, etc. for widgets at start
    # Установка статусов, текстов и прочего для виджетов на старте
        self.verCombo.addItem("1 - NO CKECKBOXES")
        self.verCombo.addItem("2 - WITH CKECKBOXES")
        self.verCombo.setCurrentIndex(0)

    # This piece of code determines whether multiple items can be selected on a ListView.
    # Этот кусочек кода определяет, можно ли выбирать несколько элементов на ListView.
        if self.verCombo.currentIndex() + 1 == 1:
            self.listView.setSelectionMode(
                QtWidgets.QAbstractItemView.ExtendedSelection
            )
            #self.show_hide_ckeckinlistView(FType=1)
        else:
            self.listView.setSelectionMode(
                QtWidgets.QAbstractItemView.SingleSelection
            )

        self.addrowinlistView(
            'Cookie dough',  # Must be store-bought
            'Hummus',  # Must be homemade
            'Spaghetti',  # Must be saucy
            'Dal makhani',  # Must be spicy
            'Chocolate whipped cream'  # Must be plentiful
        )

        self.BaseWidget.setLayout(self.grid)
        chechAllSelected_resulr1, chechAllSelected_resulr2, chechAllSelected_resulr3, chechAllSelected_resulr4 = self.chechAllSelected()
        self.BaseWidget.show()

    # Procedure for determining those items that are highlighted
    # The procedure should work both in the situation of the list with checkmarks, and without them
    # Процедура для определения тех элементов, которые выделены
    # Процедура должна работать как в ситуации списка с галочками, так и без них
    def chechAllSelected (self):
        SelectedList=[]
        list_of_indexes_selectedLayers=[]
        list_of_texts_selectedLayers=[]
        Items_list=[]
        #item = self.listView.itemFromIndex()
        selectedLayers = self.listView.selectedIndexes()

        # CUT FOR A SHEET WITHOUT TYPES
        # ОТЛАВЛИВАЕМ ДЛЯ ЛИСТА БЕЗ ГАЛОЧЕК
        if self.verCombo.currentIndex()+1==1:
            print ("Here when checking")
            for i in selectedLayers:
                item = self.listViewmodel.itemFromIndex(i)
                Items_list.append(item)
                list_of_indexes_selectedLayers.append(item.index().row())
            list_of_indexes_selectedLayers.sort()
            for i in range(len(list_of_indexes_selectedLayers)):
                SelectedList.append(int(list_of_indexes_selectedLayers[i]))
                item = self.listViewmodel.itemFromIndex(
                    self.listViewmodel.index(int(list_of_indexes_selectedLayers[i]), 0))
                list_of_texts_selectedLayers.append(item.text())
            print("List: ", list_of_indexes_selectedLayers, " ", list_of_texts_selectedLayers, " ", Items_list)

        # CUT FOR A SHEET WITH TIPS
        # ОТЛАВЛИВАЕМ ДЛЯ ЛИСТА С ГАЛОЧКАМИ
        else:
            for i in range(self.listViewmodel.rowCount()):
                if self.listViewmodel.item(i).checkState():
                    SelectedList.append(i)
        if len(SelectedList)==0: res_chechAllSelected=0
        if 0<len(SelectedList)<self.listViewmodel.rowCount(): res_chechAllSelected=1
        if 0<len(SelectedList) == self.listViewmodel.rowCount(): res_chechAllSelected = 2

        print ("In chechAllSelected:", len(SelectedList)," ", self.listViewmodel.rowCount()," ", res_chechAllSelected, " ", SelectedList)
        return len(SelectedList), self.listViewmodel.rowCount(), res_chechAllSelected, SelectedList


    # Function for entering values in ListView (any values, lists)
    # Функция ввода значений в ListView (любые значения, списки)
    def addrowinlistView(self,*rowsforadd):
        for i in rowsforadd:
            # Create an item with a caption
            item = QtGui.QStandardItem(i)
            # Add a checkbox to it
            #item.setCheckState(True)
            # generate a list for random selection
            # генерируем список для случайного выбора
            Chous_for_random = [0, 2] 
            if self.verCombo.currentIndex() + 1 == 1:
                #print("индекс переключателя: ",self.verCombo.currentIndex() + 1)
                # whether to tick the item
                # ставить ли галочку около элемента
                item.setCheckable(False)
                self.listViewmodel.appendRow(item)
                if random.choice(Chous_for_random)==2:
                    index = self.listViewmodel.indexFromItem(item)
                    sm = self.listView.selectionModel()
                    sm.select(index, QtCore.QItemSelectionModel.Select)
            else:
                # whether to tick the item
                # ставить ли галочку около элемента
                item.setCheckable(True)
                # set the status depending on the selected number
                # ставим статус в зависимости от выбранного числа
                item.setCheckState(random.choice(Chous_for_random))
                self.listViewmodel.appendRow(item)
            # Add the item to the model
            # Добавляем элемент в модель
            #self.listViewmodel.appendRow(item)
            #self.BaseWidget.listViewmodel.appendRow(item)

    def on_clicked(self, index):
        item = self.listViewmodel.itemFromIndex(index)
        myitem=QtWidgets.QListWidgetItem()
        #print (("on_clicked: itemIndex='{}', itemText='{}'"
        #        .format(item.index().row(), item.text())))
        if self.verCombo.currentIndex()+1==1:
            # print(item.index().row())
            pass
        else:
            print("""This position: """, int(item.index().row()))
            chechAllSelected_resulr1, chechAllSelected_resulr2, chechAllSelected_resulr3, chechAllSelected_resulr4 = self.chechAllSelected()
            self.StartList = chechAllSelected_resulr4
            if self.listViewmodel.item(item.index().row()).checkState():
                item.setCheckState(0)
                self.StartList.remove(item.index().row())
            else:
                item.setCheckState(2)
                self.StartList.append(item.index().row())
        print("Here")
        chechAllSelected_resulr1, chechAllSelected_resulr2, chechAllSelected_resulr3, chechAllSelected_resulr4 = self.chechAllSelected()
        #print("Here")
        #self.on_chechBox_click(FType=False, FClick=0, FStatus=chechAllSelected_resulr3)
        #self.chechAllSelected()
        #self.listViewmodel.removeRow(item.index().row())

    # mode switching (with / without checkmarks) with the removal of the function to remove / show checkmarks
    # перевлючение режима (с галочками / без) с вывозом функции убрать / показать галочки
    def onverComboActivated(self, text):
        self.verCombo.setCurrentText(text)
        len_SelectedList, listViewmodel_rowCount, res_chechAllSelected, SelectedLis = self.chechAllSelected()
        print ("This point: ", len_SelectedList," ", listViewmodel_rowCount," ", res_chechAllSelected," ", SelectedLis)
        self.show_hide_ckeckinlistView(
            self.verCombo.currentIndex(),
            listViewmodel_rowCount,
            SelectedLis
        )
        print(self.verCombo.currentText())

        # print(self.verCombo.currentText()," индекс = ", self.verCombo.currentIndex())
        # self.chechAllSelected ()

if __name__ == "__main__":
    app = HelloApplication(sys.argv)
    sys.exit(app.exec_())

headline = """ 
###############################################################################
#                                    Program                                  #
#                     a small ListView application in PyQt                    #
###############################################################################
"""

import sys
import random
from PyQt5 import QtWidgets, QtGui, QtCore                    #  , Qt

class HelloApplication(QtWidgets.QWidget):                    #QApplication):
    def __init__(self):
        super().__init__()
        self.addWidgets()

    def addWidgets(self):
        self.checkCalc  = 0
        self.StartList  = []
#        self.BaseWidget = QtWidgets.QWidget()
        self.setWindowTitle('Example List')
        
        self.grid = QtWidgets.QGridLayout()
        self.verCombo = QtWidgets.QComboBox()
        self.listView = QtWidgets.QListView()
        
# +++   
        self.listView.setSelectionMode(QtWidgets.QAbstractItemView.ExtendedSelection)     # +++
        
        self.listViewmodel = QtGui.QStandardItemModel(self.listView)
        self.listView.setModel(self.listViewmodel)

        self.listView.setModelColumn(2)
        self.grid.addWidget(self.verCombo, 0, 0, 1, 3)
        self.grid.addWidget(self.listView, 2, 0, 3, 3)

        self.listView.clicked[QtCore.QModelIndex].connect(self.on_clicked)
        self.verCombo.activated[str].connect(self.onverComboActivated)

        self.verCombo.addItem("1 - NO edit CKECKBOXES")
        self.verCombo.addItem("2 - WITH edit CKECKBOXES")
        self.verCombo.setCurrentIndex(0)

        self.addrowinlistView(
            'Cookie dough',            # Must be store-bought
            'Hummus',                  # Must be homemade
            'Spaghetti',               # Must be saucy
            'Dal makhani',             # Must be spicy
            'Chocolate whipped cream'  # Must be plentiful
        )

        self.setLayout(self.grid)
        
        chechAllSelected_resulr1, \
        chechAllSelected_resulr2, \
        chechAllSelected_resulr3, \
        chechAllSelected_resulr4 = self.chechAllSelected()


    def chechAllSelected (self):
        SelectedList = []
        list_of_indexes_selectedLayers = []
        list_of_texts_selectedLayers = []
        Items_list = []
        #item = self.listView.itemFromIndex()
        selectedLayers = self.listView.selectedIndexes()

        if self.verCombo.currentIndex()+1 == 1:
            print ("Here for check")
            for i in selectedLayers:
                item = self.listViewmodel.itemFromIndex(i)
                Items_list.append(item)
                list_of_indexes_selectedLayers.append(item.index().row())
            list_of_indexes_selectedLayers.sort()
            for i in range(len(list_of_indexes_selectedLayers)):
                SelectedList.append(int(list_of_indexes_selectedLayers[i]))
                item = self.listViewmodel.itemFromIndex(
                    self.listViewmodel.index(int(list_of_indexes_selectedLayers[i]), 0))
                list_of_texts_selectedLayers.append(item.text())
            print("List: ", list_of_indexes_selectedLayers, " ", list_of_texts_selectedLayers, " ", Items_list)

        else:
            for i in range(self.listViewmodel.rowCount()):
                if self.listViewmodel.item(i).checkState():
                    SelectedList.append(i)
        if len(SelectedList)==0:                                 res_chechAllSelected = 0
        if 0<len(SelectedList)<self.listViewmodel.rowCount():    res_chechAllSelected = 1
        if 0<len(SelectedList) == self.listViewmodel.rowCount(): res_chechAllSelected = 2

        print ("В модуле chechAllSelected:", len(SelectedList)," ", self.listViewmodel.rowCount()," ", res_chechAllSelected, " ", SelectedList)

        return len(SelectedList), self.listViewmodel.rowCount(), res_chechAllSelected, SelectedList


    def addrowinlistView(self, *rowsforadd):
        for i in rowsforadd:
            # Create an item with a caption
            item = QtGui.QStandardItem(i)
            # Add a checkbox to it
           
            item.setCheckState(True)                                               # +
            
            Chous_for_random = [0, 2]
            if self.verCombo.currentIndex() + 1 == 1:
                #print("индекс переключателя: ",self.verCombo.currentIndex() + 1)
                item.setCheckable(False)
                self.listViewmodel.appendRow(item)
                if random.choice(Chous_for_random)==2:
                    index = self.listViewmodel.indexFromItem(item)
                    sm = self.listView.selectionModel()
                    sm.select(index, QtCore.QItemSelectionModel.Select)
            else:
                item.setCheckable(True)
                item.setCheckState(random.choice(Chous_for_random))
                self.listViewmodel.appendRow(item)
                # Add the item to the model
            #self.listViewmodel.appendRow(item)
            #self.BaseWidget.listViewmodel.appendRow(item)

    def on_clicked(self, index):
        item   = self.listViewmodel.itemFromIndex(index)
        print(f"\nitem={item.text()}, index={index.row()}\n" )
        myitem = QtWidgets.QListWidgetItem()
        #print (("on_clicked: itemIndex='{}', itemText='{}'"
        #        .format(item.index().row(), item.text())))
        if self.verCombo.currentIndex()+1 == 1:
            # print(item.index().row())
            pass
        else:
            print("This position: ", int(item.index().row()))
            chechAllSelected_resulr1, chechAllSelected_resulr2, chechAllSelected_resulr3, chechAllSelected_resulr4 = self.chechAllSelected()
            self.StartList = chechAllSelected_resulr4
            if self.listViewmodel.item(item.index().row()).checkState():
                item.setCheckState(0)
                self.StartList.remove(item.index().row())
            else:
                item.setCheckState(2)
                self.StartList.append(item.index().row())
        print("Now here")
        chechAllSelected_resulr1, chechAllSelected_resulr2, chechAllSelected_resulr3, chechAllSelected_resulr4 = self.chechAllSelected()
        #print("Now here")
        #self.on_chechBox_click(FType=False, FClick=0, FStatus=chechAllSelected_resulr3)
        #self.chechAllSelected()
        #self.listViewmodel.removeRow(item.index().row())

    def onverComboActivated(self, text):
        self.verCombo.setCurrentText(text)
        len_SelectedList, listViewmodel_rowCount, res_chechAllSelected, SelectedLis = self.chechAllSelected()
        print ("\nFor print: \n\tlen_SelectedList = {}; \n\tlistViewmodel_rowCount = {};\
                \n\tres_chechAllSelected = {}; \n\tSelectedLis = {}" 
               "".format(len_SelectedList, listViewmodel_rowCount, res_chechAllSelected, SelectedLis))

# ?        self.show_hide_ckeckinlistView(
#            self.verCombo.currentIndex(),
#            listViewmodel_rowCount,
#            SelectedLis
#        )
        
        print(self.verCombo.currentText())

        # print(self.verCombo.currentText()," индекс = ", self.verCombo.currentIndex())
        # self.chechAllSelected ()

    """ ??????????????????????????????????????????????????
    def on_clicked(self, index):
        item = self.listViewmodel.itemFromIndex(index)
        myitem=QtWidgets.QListWidgetItem()
        #print (("on_clicked: itemIndex='{}', itemText='{}'"
        #        .format(item.index().row(), item.text())))
        if self.verCombo.currentIndex()+1==1:
            # print(item.index().row())
            pass
        else:
            print("This position: ", int(item.index().row()))
            chechAllSelected_resulr1, chechAllSelected_resulr2, chechAllSelected_resulr3, chechAllSelected_resulr4 = self.chechAllSelected()
            self.StartList = chechAllSelected_resulr4
            if self.listViewmodel.item(item.index().row()).checkState():
                item.setCheckState(0)
                self.StartList.remove(item.index().row())
            else:
                item.setCheckState(2)
                self.StartList.append(item.index().row())
        print("Now here")
        #chechAllSelected_resulr1, chechAllSelected_resulr2, chechAllSelected_resulr3, chechAllSelected_resulr4 = self.chechAllSelected()
        print("Now here")
        #self.on_chechBox_click(FType=False, FClick=0, FStatus=chechAllSelected_resulr3)
        #self.chechAllSelected()
        #self.listViewmodel.removeRow(item.index().row())
    """

if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    w = HelloApplication()
    w.show()
    sys.exit(app.exec_())