testing_Qt_image.py

import sys
import os
from PySide6.QtWidgets import QMainWindow, QVBoxLayout, QWidget, QApplication, QPushButton, QLabel
from PySide6.QtGui import QPixmap

from classdefs.modscaledlabel import ScaledLabel


class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()

        # Create an instance of the scaled label class:
        self.my_label = QLabel()

        # Create an instance of QPixmap using the desired image:
        self.path_to_png = 'qmark3.png'
        my_pixmap = QPixmap(self.path_to_png)

        # Display the image inside the label:
        self.my_label.setPixmap(my_pixmap)

        # Create a button:
        my_button = QPushButton()
        my_button.setText('Delete .png file')

        # Wire the button pressed signal to a function that tries to delete the gif:
        my_button.clicked.connect(self.button_clicked)

        # Place the label & button in a layout:
        layout = QVBoxLayout()
        layout.addWidget(self.my_label)
        layout.addWidget(my_button)

        # Create a placeholder widget to hold the layout.
        widget = QWidget()
        widget.setLayout(layout)

        # Set the central widget of the main window:
        self.setCentralWidget(widget)

    def button_clicked(self):
        # First, try to stop python using the png:
        # self.try_to_stop_using_png()

        # Then, attempt to delete the .png file:
        self.attempt_to_delete_png()

    def try_to_stop_using_png(self):
        self.my_label.clear()
        del self.my_label
        pass

    def attempt_to_delete_png(self):
        # Use os.remove to try to delete the gif file:
        os.remove(self.path_to_png)


app = QApplication(sys.argv)
w = MainWindow()
w.show()
app.exec()

print('app finished')

os.remove('qmark3.png')