#http://blog.csdn.net/weiaitaowang/article/details/52067647

import sys

from PyQt5.QtWidgets import QApplication ,  QWidget

from PyQt5.QtGui import QIcon

class MyIcon (QWidget):

def __init__(self):

super().__init__()

self.initUI()

def initUI(self):

self.setGeometry(100, 100,  300,  500)

self.setWindowTitle('My icon app')

self.setWindowIcon(QIcon('F:\python\source\2.png'))

self.show()

if __name__ == '__main__':

app = QApplication(sys.argv)

myicon = MyIcon()

sys.exit(app.exec_())