如何打印 qlistwidget 中所有选中项目的列表。 在蟒蛇

Question

如何返回或打印 QlistWidget 中所有选中的项目？

我能够打印选定的项目，但我想要的是打印选中的项目

所以我想检查是否检查了该项目，如果是，系统将检查的项目附加到列表中，并在最后打印此列表。

下面的代码包括 GUI 部分和功能：

• 加载文件
• 显示标题
• 显示选中的项目

代码：

    from PyQt5 import QtCore, QtGui, QtWidgets
    
    import pandas as pd
    
    from PandasModel import PandasModel
    
    import seaborn as sns
    import cufflinks as cf
    import plotly
    import plotly.offline as py
    import plotly.express as px 
    import plotly.graph_objs as go
    from plotly.offline.offline import iplot
    cf.go_offline()
    cf.set_config_file(offline=False, world_readable=True)
    
    
    class Widget(QtWidgets.QWidget):
        def __init__(self, parent=None):
            QtWidgets.QWidget.__init__(self, parent=None)
            self.gridLayout_3 = QtWidgets.QGridLayout(self)
            self.gridLayout_3.setObjectName("gridLayout_3")
           
            self.gridLayout_2 = QtWidgets.QGridLayout()
            self.gridLayout_2.setObjectName("gridLayout_2")
           
            self.gridLayout = QtWidgets.QGridLayout()
            self.gridLayout.setObjectName("gridLayout")
            
            self.pathLE = QtWidgets.QLineEdit(self)
            self.gridLayout_2.addWidget(self.pathLE, 0, 1, 1, 1)
            
    
            
            self.loadBtn = QtWidgets.QPushButton("Select File", self)
            self.loadBtn.clicked.connect(self.loadFile)
            self.gridLayout_2.addWidget(self.loadBtn, 0, 0, 1, 1)
            self.gridLayout_3.addLayout(self.gridLayout_2, 0, 0, 1, 4)
    
           
            self.displayHeader = QtWidgets.QPushButton("Display header", self)
            self.displayHeader.clicked.connect(lambda: self.print_df_header(self.df))
            self.gridLayout.addWidget(self.displayHeader, 2, 0, 1, 1)
            
            self.displayDF_checked_header = QtWidgets.QPushButton("Print checked item", self)
            self.displayDF_checked_header.clicked.connect(lambda: self.setItems(self.df))
            self.gridLayout.addWidget(self.displayDF_checked_header, 5, 0, 1, 1)
       

            
            self.header_list = QtWidgets.QListWidget(self)
            self.header_list.setObjectName("listWidget")
            self.header_list.itemSelectionChanged.connect(self.selectionChanged)
            self.gridLayout_3.addWidget(self.header_list, 1, 2, 1, 1)
       

            self.pandasTv = QtWidgets.QTableView(self)
            self.verticalLayout.addWidget(self.pandasTv)
    
            self.pandasTv.setSortingEnabled(True)
    
    
         def loadFile(self):
            fileName, _ = QtWidgets.QFileDialog.getOpenFileName(self, "Open File", "", "CSV Files (*.csv)");
            self.pathLE.setText(fileName)
            df = pd.read_csv(fileName)
            model = PandasModel(df)
            self.pandasTv.setModel(model)
            self.df = df
    
         def print_df_header(self,df):
            savelist = list(self.df)
            for item in savelist:
                qitem = QtWidgets.QListWidgetItem ( ) 
                qitem.setText ( item ) 
                qitem.setCheckState ( QtCore.Qt.Unchecked ) 
                self.header_list.addItem ( qitem )
            print(savelist)

         def setItems(self, item):
            self.items=[]
            if item.checkState() == QtCore.Qt.Checked:
              self.items.append(item)
              print(self.items.append(item))
        
            if item.checkState() == QtCore.Qt.Unchecked:
              self.items.remove(item)

# this function allow to print the selected items
         def selectionChanged(self):
            print("Selected items: ", self.header_list.selectedItems())
    
    if __name__ == "__main__":
        import sys
        app = QtWidgets.QApplication(sys.argv)
        w = Widget()
        w.show()
        sys.exit(app.exec_())  

Answer 1

您需要遍历所有项目并检查它们的checkState() ：

def selectionChanged(self):
    checked = []
    for row in range(self.header_list.count()):
        item = self.header_list.item(row)
        if item.checkState():
            checked.append(item)
    print("Checked items: ", ", ".join(i.text() for i in checked))