# coding=utf-8from PyQt4.QtGui import *from PyQt4.QtCore import *import localeclass MyQThread(QThread):    def __init__(self, parent=None):        super(MyQThread, self).__init__(parent)        self.working = True        self.num = 0    def __del__(self):        self.working = False        self.wait()    def run(self):        while self.working == True:            file_str = 'File index {0}'.format(self.num)            self.num += 1            self.emit(SIGNAL('output(QString)'), file_str)            self.sleep(3)            print 'jianpan'