utils.py 文件源码

def __init__(self, present, past=None, max_value=1, vars=None,
                 **kwargs):

        self.present = present
        self.sub_bar = None
        self.finished = None

        if past is None:
            past = present

        self.msg_bar = MessageBar(
            msg=present, finish_msg="%s finished in" % past)
        widgets = [self.msg_bar, " "]

        if max_value is None:
            widgets.append(progressbar.Timer(format="%(elapsed)s"))
        else:
            widgets.append(progressbar.ETA(
                format="ETA: %(eta)s",
                format_finished="%(elapsed)s"))

        if vars is not None:
            self.var_vals = progressbar.FormatCustomText(
                " (" + ", ".join("%s: %%(%s)s" % (v, v) for v in vars) + ")",
                {v: "---" for v in vars})
            widgets.append(self.var_vals)
        else:
            self.var_vals = None

        def update_thread():
            while not self.finished:
                if self.sub_bar is None or self.sub_bar.finished:
                    self.update()
                time.sleep(0.001)

        self.thread = threading.Thread(target=update_thread)
        self.thread.daemon = True

        if max_value is None:
            max_value = progressbar.UnknownLength

        super(ProgressBar, self).__init__(
            poll_interval=0.1, widgets=widgets, fd=sys.stdout,
            max_value=max_value, **kwargs)