query.py 文件源码

def __iter__(self):
        if self.count != 0:
            widgets = [
                '%s: ' % (self.caption,),
                progressbar.Percentage(),
                ' ',
                progressbar.Bar(),
                ' ',
                progressbar.ETA(),
            ]
            pbar = progressbar.ProgressBar(widgets=widgets, maxval=self.count)
            pbar.start()
            for idx, item in enumerate(self.iterator):
                yield item
                pbar.update(idx)
            pbar.finish()