I have a gui file and I designed it with qtdesigner, and there are another py file. I tried to changing button name or tried to add item in listwidget but I didn't make that things. I got an error message.

My codes;

from gui import Ui_mainWindow
import sys
from PyQt5 import QtCore, QtGui, QtWidgets
import mainclass Music(QtWidgets.QMainWindow, Ui_mainWindow):def __init__(self):super().__init__()self.setupUi(self)self.search_button.clicked.connect(self.searchbutton)def searchbutton(self):base = main.Main()self.url = base.search(self.search_box.text())self.dict = base.get_data(self.url)print(self.dict)for i in self.dict:self.setupUi.self.listWidget.addItem(i)app = QtWidgets.QApplication(sys.argv)
gui = Music()
gui.show()
sys.exit(app.exec_())

and gui.py

from PyQt5 import QtCore, QtGui, QtWidgetsclass Ui_mainWindow(object):def setupUi(self, mainWindow):mainWindow.setObjectName("mainWindow")mainWindow.resize(413, 613)mainWindow.setMinimumSize(QtCore.QSize(413, 613))mainWindow.setMaximumSize(QtCore.QSize(413, 613))mainWindow.setAutoFillBackground(False)self.centralwidget = QtWidgets.QWidget(mainWindow)self.centralwidget.setObjectName("centralwidget")self.musics_frame = QtWidgets.QFrame(self.centralwidget)self.musics_frame.setGeometry(QtCore.QRect(-1, 49, 411, 441))self.musics_frame.setFrameShape(QtWidgets.QFrame.StyledPanel)self.musics_frame.setFrameShadow(QtWidgets.QFrame.Raised)self.listWidget = QtWidgets.QListWidget(self.musics_frame)self.listWidget.setGeometry(QtCore.QRect(10, 10, 391, 421))self.listWidget.setIconSize(QtCore.QSize(5, 5))self.listWidget.setGridSize(QtCore.QSize(5, 5))self.listWidget.setViewMode(QtWidgets.QListView.IconMode)self.listWidget.setObjectName("listWidget")#  ....#  ....#  ....

and my error message

  File "/home/yavuz/Genel/youtube-sounds/music.py", line 19, in searchbuttonself.setupUi.self.listWidget.addItem(i)AttributeError: 'function' object has no attribute 'self'

When you use the ui class as a mixin, all the widgets from Qt Designer will be added as instance attributes of the Music class. So you just want:

    self.listWidget.addItem(i)

PS: and set the icon/grid size to something sensible (e.g. 32 x 32), otherwise the list items will be too small to see.