python - How to set a window icon with PyQt5?

Question

from PyQt5 import QtWidgets, QtGui
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *

class Application(QMainWindow):
    def __init__(self):
        super(Application, self).__init__()
        self.setWindowIcon(QtGui.QIcon('icon.png'))

I am trying to set a window icon (top left of the window) but the normal icon disappeared instead.

I tried with many icon resolutions (8x8, 16x16, 32x32, 64x64) and extensions (.png and .ico).

What am I doing wrong?

Answer 1

The command, as suggested by asker, works for me:

 self.setWindowIcon(QtGui.QIcon('icon.png'))

I put 256x256 png and all was OK. I have Win 7 pro 64 bit, Python 3.5.2 32 bit.