Created GUI icon not showing when running file in PyCharm Follow

Hello,

I am going trough some Python examples of making a simple GUI. For some reason when I run the script from PyCharm it will not change the little application icon on the left that I set to web.pgn. I believe the code is alright. The writer of the tutorial suggests trying to set this option on: Settings/Settings Edidor select xfwm4. Find the show_app_icon

I cannot find this option under the editor settings of pycharm however. Am I missing something?

import sys
from PyQt5.QtWidgets import QApplication, QWidget
from PyQt5.QtGui import QIcon


class Example(QWidget):

    def __init__(self):
        super().__init__()

        self.initUI()

    def initUI(self):
        self.setGeometry(300, 300, 300, 220)
        self.setWindowTitle('Icon')
        self.setWindowIcon(QIcon('web.png'))

        self.show()


if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())