from PySide6.QtWidgets import QApplication, QWidget
from PySide6.QtGui import QIcon
import os
import sys

class Window(QWidget):
    def __init__(self):
        super().__init__()
        self.resize(250, 150)
        self.setWindowTitle('Window Icon')
        here = os.path.dirname(__file__)
        icon = os.path.join(here, 'web.png')
        self.setWindowIcon(QIcon(icon))

if __name__ == '__main__':
    app = QApplication(sys.argv)
    window = Window()
    window.show()
    sys.exit(app.exec())