[FIXED] Invoke method in another class, python

Issue

i'm not very deep into Python for now. But i have in my opinion very simple, but non googable question.

class Ui_MainWindow(object):
def setupUi(self, MainWindow):
    MainWindow.setObjectName("MainWindow")
    MainWindow.resize(659, 600)
    self.centralwidget = QtWidgets.QWidget(MainWindow)
    self.centralwidget.setObjectName("centralwidget")
    ...Code Omitted...
    self.label = QtWidgets.QLabel(self.centralwidget)
    self.label.setGeometry(QtCore.QRect(190, 370, 391, 31))
    self.label.setObjectName("label")
    self.label.setFont(QtGui.QFont("Arial",20))
    self.label.setStyleSheet("color:white")
    ...Code Omitted...
    MainWindow.setStatusBar(self.statusbar)
    ...Code Omitted...
    self.retranslateUi(MainWindow)
    QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def AddTextToString(self, text123):
        _translate = QtCore.QCoreApplication.translate
         self.label.setText(_translate("MainWindow",text123))

class MyThread(QThread):
...Code Omitted...
    def run(self):
        ...Code Omitted...
        Ui_MainWindow().AddTextToString("Hello Word")

all i want to do, is to invoke a method, from another class with a passing variable from another method inside another class.

AttributeError: 'Ui_MainWindow' object has no attribute 'label'

Solution

First the variable self.label is initialized once setupUI method is called not in __init__ so you should call the setupUI method after initialization of Ui_MainWindow

Second You can't call Ui_MainWindow().AddTextToString("Hello Word") as AddTextToString is not static method and it modifies class variable..

You need to create object of Ui_MainWindow like self.ui_window = Ui_MainWindow() and call self.ui_window.AddTextToString("Hello World")

Answered By - Ayush Shah