[FIXED] PyQt5: Get list of all properties in an object (QPushButton)

Issue

Using .setProperty I have assigned a few properties, dynamic properties if I'm not mistaken, to a QPushButton. I would like to be able to get a list of all the properties for that button, ideally I would just want the 'button' and 'test' properties that I have added. I tried 'QObject.dynamicPropertyNames' but it gives me an output that I do not understand nor am I sure if it is what I am looking for.

import sys
from PyQt5 import QtCore, QtWidgets
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *


class MainWindow(QMainWindow):
    def __init__(self):
        QMainWindow.__init__(self)
        self.setMinimumSize(QSize(400, 400))    
        texts= ['button1']
        self.pybutton = {}

        list_props = QPushButton('list_props', self)
        list_props.clicked.connect(self.list_props)
        list_props.resize(100,115)


        for x, (text, t) in enumerate(zip(texts, range(300,0,-100))):
            btn = QPushButton(text, self) 
            btn.setObjectName('btn{}'.format(x+1))
            btn.resize(100,100)
            btn.move(t,100)
            btn.setStyleSheet('QPushButton::menu-indicator { image: none; }')

            menu = QMenu()
            btn.setMenu(menu)
            args = ("button", btn)
            args2 = ("test", btn)
            menu.setProperty(*args)
            for act in ("item1", "item2", "item3"):
                action = menu.addAction('item1',self.status)
                action.setProperty(*args)
                action.setProperty(*args2)
            menu2 = menu.addMenu('menu2')
            action = menu2.addAction('item4', self.status)
            action.setProperty(*args)
            action.setProperty(*args2)
            self.pybutton[str(x+1)] = btn

        self.statusBar()

    def status(self):
        action = self.sender()
        btn = action.property("button")
        self.statusBar().showMessage('{} was pressed with button: {}'.format(action.text(), btn.text()))


    def list_props(self):
        for i in self.pybutton:
            x = self.pybutton[str(i)]
            print(x.objectName(),x.text())
            p = QObject.dynamicPropertyNames(x)
            print(p)

if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    mainWin = MainWindow()
    mainWin.show()
    sys.exit( app.exec_() )

Output:

[PyQt5.QtCore.QByteArray(b'_q_styleSheetWidgetFont'), 
PyQt5.QtCore.QByteArray(b'_q_stylestate'), 
PyQt5.QtCore.QByteArray(b'_q_stylerect'), 
PyQt5.QtCore.QByteArray(b'_q_isdefault'), 
PyQt5.QtCore.QByteArray(b'_q_no_animation')]

Solution

If you check your code clearly you will see that you have not established any dynamic properties to the QPushButton except the styleSheet.

...
for x, (text, t) in enumerate(zip(texts, range(300,0,-100))):
    btn = QPushButton(text, self) 
    ...
    menu = QMenu()
    btn.setMenu(menu)
    args = ("button", btn)
    args2 = ("test", btn)
    menu.setProperty(*args) # You have created a dynamic property to QMenu.
    for act in ("item1", "item2", "item3"):
        action = menu.addAction('item1',self.status)
        action.setProperty(*args) # You have created a dynamic property to QAction
        action.setProperty(*args2) # You have created a dynamic property to QAction
    menu2 = menu.addMenu('menu2')
    action = menu2.addAction('item4', self.status)
    action.setProperty(*args) # You have created a dynamic property to QAction
    action.setProperty(*args2) # You have created a dynamic property to QAction
    self.pybutton[str(x+1)] = btn
...

I will improve your code and every time you print you will get the dynamic properties of the widget if you have it.

def list_props(self):
    for topLevel in QApplication.topLevelWidgets():
        for children in topLevel.findChildren(QObject):
            dproperties_names = children.dynamicPropertyNames()
            if dproperties_names:
                print("{}: ".format(children))
                for property_name in dproperties_names:
                    print("\t{}:{}".format(property_name, children.property(property_name)))

Output:

<PyQt5.QtWidgets.QAction object at 0x7f251731aca8>: 
    b'button':<PyQt5.QtWidgets.QPushButton object at 0x7f251731a948>
    b'test':<PyQt5.QtWidgets.QPushButton object at 0x7f251731a948>
<PyQt5.QtWidgets.QPushButton object at 0x7f251731a948>: 
    b'_q_styleSheetWidgetFont':<PyQt5.QtGui.QFont object at 0x7f25172975f8>
<PyQt5.QtWidgets.QAction object at 0x7f251731aa68>: 
    b'button':<PyQt5.QtWidgets.QPushButton object at 0x7f251731a948>
    b'test':<PyQt5.QtWidgets.QPushButton object at 0x7f251731a948>
<PyQt5.QtWidgets.QAction object at 0x7f251731aaf8>: 
    b'button':<PyQt5.QtWidgets.QPushButton object at 0x7f251731a948>
    b'test':<PyQt5.QtWidgets.QPushButton object at 0x7f251731a948>
<PyQt5.QtWidgets.QAction object at 0x7f251731ab88>: 
    b'button':<PyQt5.QtWidgets.QPushButton object at 0x7f251731a948>
    b'test':<PyQt5.QtWidgets.QPushButton object at 0x7f251731a948>
<PyQt5.QtWidgets.QAction object at 0x7f251731aca8>: 
    b'button':<PyQt5.QtWidgets.QPushButton object at 0x7f251731a948>
    b'test':<PyQt5.QtWidgets.QPushButton object at 0x7f251731a948>

Answered By - eyllanesc