pyqt之倒计时例子

from PyQt4.Qt import *
from PyQt4.QtCore import *
from PyQt4.QtGui import *
import sys
def main():
    a=QApplication(sys.argv)
    l=QLabel()
    data=QDate.currentDate()
    yaer=QDate(2015,02,18)
    shui=data.daysTo(yaer)
    shu=QString.number(shui)
    string=QString(u'离过年还有<font color="red";><b>')
    tian=QString(u'</b></font>天')
    string=string+shu+tian
    l.setText(string)
    l.setWindowTitle(u'倒计时')
    font=QFont()
    font.setPointSize(30)
    l.setFont(font)
    l.resize(300,43)
    l.show()
    a.exec_()

main()

如图: