Trouble displaying an image in PyQt4

I am attempting to learn how to use PyQt4. For some reason I can not seem to display this logo.

Code:

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import sys
from PyQt4 import QtGui
 
class Window(QtGui.QMainWindow):
  def __init__(self):
    super(Window, self).__init__() #returns parent object (q main window object)
    self.setGeometry(50, 50, 500, 300)
    self.setWindowTitle("PyQt4 Window")
 
    y = '/home/rob/PycharmProjects/untitled/Logo.jpg'
 
    self.setWindowIcon(QtGui.QIcon(y))
    self.show()
 
app = QtGui.QApplication(sys.argv)
GUI = Window()
 
sys.exit(app.exec_())

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What am I doing wrong?

EDIT: using Ubuntu 16.04 and py3

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Added after 31 minutes:

Is there a way to mark these posts as solved? Turns out it is working. I was expecting the image to show up on the actual pop-up window; however, it appears on the icon in the task bar not the window and I just never noticed until a moment ago.