QAction icon is not showing in Qtoolbar

Question

I have a problem with QToolbar and QAction. I'm trying to show an action with a icon but the icon is not showing.

This is my qrc and code example (I'm using PySide2):

<!DOCTYPE RCC><RCC version="1.0">
<qresource prefix="/iconos">
    <file alias="vista-inicial.svg">iconos/cubo.svg</file>
    <file alias="cubo.png">iconos/3d.png</file>
</qresource>
</RCC>

import sys
from PySide2 import QtCore, QtWidgets, QtGui


class MyWidget(QtWidgets.QWidget):
    def __init__(self):
        super().__init__()

        toolbar = QtWidgets.QToolBar()
        toolbar.setToolButtonStyle(QtCore.Qt.ToolButtonIconOnly)
        toolbar.setIconSize(QtCore.QSize(24, 24))
        accion_vista_inicial = QtWidgets.QAction(QtGui.QIcon(":iconos/cubo.png"), "Vista Inicial", self)

        toolbar.addAction(accion_vista_inicial)

        layout = QtWidgets.QVBoxLayout()
        layout.addWidget(toolbar)
        layout.addWidget(QtWidgets.QLabel("Test"))

        self.setLayout(layout)

        self.show()


def main():
    app = QtWidgets.QApplication(sys.argv)
    test = MyWidget()
    sys.exit(app.exec_())


if __name__ == "__main__":
    main()

And finally a little screenshot:

Answer 1

You need to convert the .qrc into .py and import it into your script:

pyside2-rcc resource.qrc -o resource_rc.py

import sys

from PySide2 import QtCore, QtWidgets, QtGui

import resource_rc

# ...