TypeError：“ Progressbar”对象不可调用

Question

我想在浏览器中添加一个等待窗口，并编写以下内容：

    from progressbar import ProgressBar

    bar = Progressbar(self.miFrame, orient="horizontal", length=200, mode="determinate")
    bar.grid()
    bar.grid_forget()

    for i in bar(range(100)):
        time.sleep(200)