Set QLineEdit text from function in second file

[Samuel Bachorik]

Hello, iam trying to set text from function in other file and it is not working can you help me with this ? Let me give you example....

My button is connected to function clicked0 and this button should change text.
This is my main file

   class Window(QMainWindow):

   def __init__(self):
       super().__init__()
       self.textboxvalue2 = ""


       self.setWindowTitle("Samuel calc™")
       self.setGeometry(200, 200, 259, 258)

       self.textbox = QLineEdit(self)
       self.textbox.move(5, 5)
       self.textbox.resize(188, 35)
       self.textbox.setText(str(self.textboxvalue2))
       self.textbox.setPlaceholderText("Enter numbers")
       self.textboxValue = self.textbox.text()

       self.b10 = QtWidgets.QPushButton(self)
       self.b10.setText("0")
       self.b10.move(68, 219)
       self.b10.resize(60, 35)
       self.b10.clicked.connect(self.clicked0)


       self.show()

   def setExpression(self,expression):
       print(expression)
       self.textbox.setText(str(expression))


   def clicked0(self):
       import AbstratctNumberButton
       AbstratctNumberButton.onClick()


if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = Window()
    sys.exit(app.exec())

And this is my second file from where i call function onClick()
secondFile.py

from main import Window

def onClick():
    print("abstract button")
    dj = Window()
    dj.setExpression(str(0))

When i run this my button not working.. when i put this function in main.py file then it is wokking

[SGaist]

Hi,

"dj" lifetime is related to onClick.

[Samuel Bachorik]

Iam sorry i dont understand ? What should i do to get it work ?

[jsulm]

@Samuel-Bachorik dj is a local variable inside onClick. It is destroyed as soon as onClick finishes. Make dj a variable in secondFile.py or a member variable if onClick is in a class.

[JonB]

@Samuel-Bachorik
Probably make dj a member variable in self. As it stands, dj = Window() creates a Window, but then goes out of scope and so the Window gets destroyed as soon as you exit the onClick() slot.

However, I suspect there is/may be some confusion here. You create one window = Window in the __main__ scope. Window is a QMainWindow. You then create a new, separate Window in onClick. Why? In normal case your program should have only one QMainWindow, why do you want a second one? If you want another window, why make it a QMainWindow?