list of all file types

then choose "pdf document" from the list of file types

免费basic food shopping list | 样本文件在 allbusinesstemplates.

无论是list还是map都是用冒号破折号缩进所以学习yaml的写法是很简单

场景1 读取一个文件夹中所有文件,存入到一个list表中

note that .jpg has been added to the list of file types.

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