目录背景导入包代码演示效果演示 背景 在python中，我们如果需要操作文档，则需要用户指定文档，那么，如何引导用户指定或者选择文档呢www.devze.com？
Today I was reading through some Hibernate code and I encounter something interesting. There is a class called CollectionHelper that defines the following constant varibale:
加载中,请稍侯......