进度条是当我们处理冗长的任务时使用的控件，它是以动画的形式让用户知道该任务正在取得进展。
I have a share folder ,which i want to grant access permission to few peo开发者_如何学Pythonple only at certain times.i.e. while they try to access the folder ,i should be able to either allow or deny
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