PyQt5 retrieving ID and values from multiple Buttons created in an open loop

I'm trying to create buttons (QPushButtons) based on an entry (QLineEdit). The idea is that I want the user to be able to create as many buttons as wanted, simply by adding new text in the entry box and by then pressing "Add Label" (see picture below).

UI so far

While I'm able to do this, I can't for now retrieve the label value of each of these buttons, since the procedure I use erases all the previous values (I can only retrieve the last value entered). I'd like to be able to print each specific Label Value when clicking each button.

My code is below:

from PyQt5.QtWidgets import QApplication, QMainWindow, QPushButton, QLineEdit
import sys

    class MyWindow(QMainWindow):
        def __init__(self):
            super(MyWindow, self).__init__()
            self.setGeometry(100, 100, 1500, 1500)
            self.setWindowTitle("My Program")
            self.labelButtons = []  # List of all the buttons displaying labels
            self.eraseButtons = []  # List of all the buttons displaying "X"
            self.Yposition = 50
            self.initUI()

        def initUI(self):
            self.labelEntry = QLineEdit(self)
            self.labelEntry.move(50, self.Yposition)
            self.labelEntry.resize(300, 40)

            self.addLabelButton = QPushButton(self)
            self.addLabelButton.setText("Add Label")
            self.addLabelButton.move(400, self.Yposition)
            self.addLabelButton.resize(300, 40)
            self.addLabelButton.clicked.connect(self.addNewLabel)

        def addNewLabel(self):
            self.Yposition += 50
            self.newLabelName = self.labelEntry.text()
            self.labelButtons.append(self.createButtonLabel(self.newLabelName))
            self.eraseButtons.append(self.eraseButtonLabel())
            self.updatelabels()

        def createButtonLabel(self, labelname):
            self.button = QPushButton(self)
            self.button.setText(str(labelname))
            self.button.resize(300, 40)
            self.button.move(50, self.Yposition)
            self.button.clicked.connect(self.printbutton)
            return self.button

        def eraseButtonLabel(self):
            self.buttonErase = QPushButton(self)
            self.buttonErase.setText("X")
            self.buttonErase.resize(40, 40)
            self.buttonErase.move(360, self.Yposition)
            self.buttonErase.clicked.connect(self.printbutton)
            return self.buttonErase

        def updatelabels(self):
            for button in self.labelButtons:
                button.show()
            for button in self.eraseButtons:
                button.show()

        def printbutton(self):
            print(self.button.text())


    if __name__ == '__main__':
        app = QApplication(sys.argv)
        win = MyWindow()
        win.show()
        sys.exit(app.exec_())

<!-- end snippet -->

Solution

Using Google pyqt clicked event I found you have to use

def printbutton(self):
    widget = self.sender()
    print(widget.text())

ZetCode: Events and signals in PyQt5

EDIT:

As for erease button - you should get button from createButtonLabel and send it to eraseButtonLabel

    labelbutton = self.createButtonLabel(self.newLabelName)
    erasebutton = self.eraseButtonLabel(labelbutton)

and you can use lambda to assing function with argument

def eraseButtonLabel(self, labelbutton):
    # ... code ...
    self.buttonErase.clicked.connect(lambda: self.erasebutton(labelbutton))

and function should get this argument

def erasebutton(self, button):
    widget = self.sender()
    print('clicked:', widget.text())
    print('  erase:', button.text())

Or you can assing button to own variable in buttonErase

def eraseButtonLabel(self, labelbutton):
    # ... code ...
    self.buttonErase.assigned_button = labelbutton
    self.buttonErase.clicked.connect(self.erasebutton)

and use it in function

def erasebutton(self):
    widget = self.sender()
    print('clicked:', widget.text())
    print('  erase:', widget.assigned_button.text())

Full code which uses both methods at the same time but you need only one method.

from PyQt5.QtWidgets import *
import sys

class MyWindow(QMainWindow):
    def __init__(self):
        super(MyWindow, self).__init__()
        self.setGeometry(100, 100, 1500, 1500)
        self.setWindowTitle("My Program")
        self.labelButtons = []  # List of all the buttons displaying labels
        self.eraseButtons = []  # List of all the buttons displaying "X"
        self.Yposition = 50
        self.initUI()

    def initUI(self):
        self.labelEntry = QLineEdit(self)
        self.labelEntry.move(50, self.Yposition)
        self.labelEntry.resize(300, 40)

        self.addLabelButton = QPushButton(self)
        self.addLabelButton.setText("Add Label")
        self.addLabelButton.move(400, self.Yposition)
        self.addLabelButton.resize(300, 40)
        self.addLabelButton.clicked.connect(self.addNewLabel)

    def addNewLabel(self):
        self.Yposition += 50
        self.newLabelName = self.labelEntry.text()
        
        labelbutton = self.createButtonLabel(self.newLabelName)
        erasebutton = self.eraseButtonLabel(labelbutton)
        
        self.labelButtons.append(labelbutton)
        self.eraseButtons.append(erasebutton)
        self.updatelabels()

    def createButtonLabel(self, labelname):
        self.button = QPushButton(self)
        self.button.setText(str(labelname))
        self.button.resize(300, 40)
        self.button.move(50, self.Yposition)
        self.button.clicked.connect(self.printbutton)
        return self.button

    def eraseButtonLabel(self, labelbutton):
        self.buttonErase = QPushButton(self)
        self.buttonErase.setText("X")
        self.buttonErase.resize(40, 40)
        self.buttonErase.move(360, self.Yposition)
        self.buttonErase.assigned_button = labelbutton
        self.buttonErase.clicked.connect(lambda: self.erasebutton(labelbutton))
        #self.buttonErase.clicked.connect(self.erasebutton)
        return self.buttonErase    

    def updatelabels(self):
        for button in self.labelButtons:
            button.show()
        for button in self.eraseButtons:
            button.show()

    def printbutton(self):
        print('clicked:', self.sender().text())

    def erasebutton(self, button):
        widget = self.sender()
        print('clicked:', widget.text())
        print('  erase:', button.text())
        print('  erase:', widget.assigned_button.text())

if __name__ == '__main__':
    app = QApplication(sys.argv)
    win = MyWindow()
    win.show()
    sys.exit(app.exec_())

EDIT:

Other method is to create own widget which has both buttons labelbutton and erasebutton and then erasebutton has direct access only to own labelbutton.

BTW: and for similar reason I would keep buttons as pairs

 self.buttons.append([labelbutton, erasebutton])

instead of separted lists

 self.labelButtons.append(labelbutton)
 self.eraseButtons.append(erasebutton)

Example in which I create own widget.

from PyQt5.QtWidgets import *
import sys

class MyWidget(QWidget):
    def __init__(self, parent, labelname, *args, **kwargs):
        super().__init__(parent, *args, **kwargs)

        self.resize(350, 40)
        
        self.labelButton = QPushButton(self)
        self.labelButton.setText(str(labelname))
        self.labelButton.resize(300, 40)
        self.labelButton.move(0, 0)
        self.labelButton.clicked.connect(self.printbutton)

        self.buttonErase = QPushButton(self)
        self.buttonErase.setText("X")
        self.buttonErase.resize(40, 40)
        self.buttonErase.move(310, 0)
        self.buttonErase.clicked.connect(self.erasebutton)

        self.show()

    def printbutton(self):
        print('clicked:', self.labelButton.text())

    def erasebutton(self):
        print('clicked:', self.buttonErase.text())
        print('  erase:', self.labelButton.text())


class MyWindow(QMainWindow):
    def __init__(self):
        super(MyWindow, self).__init__()
        self.setGeometry(100, 100, 1500, 1500)
        self.setWindowTitle("My Program")
        self.widgets = []
        self.Yposition = 50
        self.initUI()

    def initUI(self):
        self.labelEntry = QLineEdit(self)
        self.labelEntry.move(50, self.Yposition)
        self.labelEntry.resize(300, 40)

        self.addLabelButton = QPushButton(self)
        self.addLabelButton.setText("Add Label")
        self.addLabelButton.move(400, self.Yposition)
        self.addLabelButton.resize(300, 40)
        self.addLabelButton.clicked.connect(self.addNewLabel)

    def addNewLabel(self):
        self.Yposition += 50
        text = self.labelEntry.text()
                
        widget = MyWidget(self, text)
        widget.move(50, self.Yposition)
        
        self.widgets.append(widget)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    win = MyWindow()
    win.show()
    sys.exit(app.exec_())