[FIXED] The python pyqt5 class references

Issue

In panel.py the class that references buttonA in class cannot be signaled.

But in the panel2.py reference buttonA class can be achieved If you want to repeat the use of buttonA class in the panel.py class, how to deal with such a problem. Try to inherit buttonA class can only occur once btnA1

buttonA.py

#!/usr/bin/env python
from PyQt5.QtWidgets import QWidget, QPushButton, QVBoxLayout, QApplication

class ButtonA(QWidget):
    def __init__(self):
        super().__init__()
    
    def createButton(self):
        self.btnA1 = QPushButton("btnA1", self)
        self.btnA1.pressed.connect(self.onbtnA1Pressed)
        self.btnA1.released.connect(self.onbtnA1Released)
        vbox = QVBoxLayout()
        vbox.addWidget(self.btnA1)
        return vbox

    def onbtnA1Pressed(self):
        self.btnA1.setText("btnA1 clicked")

    def onbtnA1Released(self):
        self.btnA1.setText("btnA1")

panel.py

#!/usr/bin/env python
from PyQt5.QtWidgets import QWidget, QVBoxLayout, QApplication
import sys, buttonA

class Panel(QWidget):
    def __init__(self):
        super().__init__()

    def createPanel(self):
        a1 = buttonA.ButtonA()
        a2 = buttonA.ButtonA()
        v1 = a1.createButton()
        v2 = a2.createButton()
    
        vbox = QVBoxLayout()
        vbox.addLayout(v1)
        vbox.addLayout(v2)
        self.setLayout(vbox)
    
if __name__ == "__main__":
    app = QApplication(sys.argv)
    p = Panel()
    p.createPanel()
    p.show()
    sys.exit(app.exec_())

panel2.py

#!/usr/bin/env python
from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout
import buttonA, sys

app = QApplication(sys.argv)
w = QWidget()

a1 = buttonA.ButtonA()
a2 = buttonA.ButtonA()
v1 = a1.createButton()
v2 = a2.createButton()

vbox = QVBoxLayout()
vbox.addLayout(v1)
vbox.addLayout(v2)
w.setLayout(vbox)
w.show()

sys.exit(app.exec_())

Solution

In panel.py, in your createPanel function you have to use an instance, in this case self, when declaring instance variables.

This should work:

panel.py

#!/usr/bin/env python
from PyQt5.QtWidgets import QWidget, QVBoxLayout, QApplication
import sys, buttonA

class Panel(QWidget):
    def __init__(self):
        super().__init__()

    def createPanel(self):
        self.a1 = buttonA.ButtonA()
        self.a2 = buttonA.ButtonA()
        self.v1 = self.a1.createButton()
        self.v2 = self.a2.createButton()

        vbox = QVBoxLayout()
        vbox.addLayout(self.v1)
        vbox.addLayout(self.v2)
        self.setLayout(vbox)

if __name__ == "__main__":
    app = QApplication(sys.argv)
    p = Panel()
    p.createPanel()
    p.show()
    sys.exit(app.exec_())

Answered By - U12-Forward