the pyqt4 tutorial 窗体标题与icon

eg:

# icon.py
import sys
from PyQt4 import QtGui
class Icon(QtGui.QWidget):
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)
        self.setGeometry(300, 300, 250, 150)
        self.setWindowTitle('Icon')  #窗体标题
        self.setWindowIcon(QtGui.QIcon('icons/web.png')) #窗体icon
        self.setToolTip('This is a <b>QWidget</b> widget') #提示，richedit格式文本
        QtGui.QToolTip.setFont(QtGui.QFont('OldEnglish', 10))
app = QtGui.QApplication(sys.argv)
icon = Icon()
icon.show()
sys.exit(app.exec_())