How to work with pointers in PyQt?

[AlekseyPython]

There are specific Message Windows you can use, they automatically have the right symbol

QMessageBox.information
QMessageBox.warning
QMessageBox.critical

for example

    def about(self):
        QMessageBox.information(self, "About myApp",
                "<center><b>myApplication</b><br>1.0<br>"
                "© 2019</center>")

Thank you, but I have a long processing that should work in the background. Therefore, the dialog boxes are not suitable, I chose to display messages about the current process on the text field of the form.
But at the end of the work I show the final result with the help of the dialog boxes you have proposed :)