How to add item to QListWidget when press a button in pySide2?

Question

I try to google it but no answer, look like QListWidget isnt dynamic module

Here is my code:

        listwidget = QtWidgets.QListWidget()
        for a in range (0,3):
            listwidget.addItem(str(a))

        button_layout = QHBoxLayout()
        self.buttfind = QPushButton('Find')
        self.buttfind.clicked.connect(self.find)
        self.buttmerge = QPushButton('Merge')
        self.buttmerge.clicked.connect(self.merge)
        button_layout.addWidget(self.buttfind)
        button_layout.addWidget(self.buttmerge)

        main_layout.addWidget(listwidget)
        main_layout.addLayout(button_layout)
        self.setLayout(main_layout)

    def merge(self):
        print('a')
        listwidget.addItem(str('asd'))

I get the problem at:

    def merge(self):
        print('a')
        listwidget.addItem(str('asd'))

The error: listwidget.addItem(str('asd')) NameError: name 'listwidget' is not defined

try replacing all `qlistwidget` with `self.qlistwidget` – S. Nick Feb 09 '20 at 09:23 — S. Nick, Feb 09 '20 at 09:23

score 0 · Accepted Answer · answered Feb 09 '20 at 09:23

0

listwidget only has function scope, so that variable reference is lost at the end of your first function.

Changing listwidget to self.listwidget will give the variable instance scope.

answered Feb 09 '20 at 09:23

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How to add item to QListWidget when press a button in pySide2?

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