如何在django中生成临时文件然后销毁 [英] How to generate temporary file in django and then destroy

问题描述

我正在做一些文件处理和生成文件，我需要从现有数据生成一些临时文件，然后使用该文件作为我的功能的输入。

I am doing some file processing and for generating the file i need to generate some temporary file from existing data and then use that file as input to my function.

但是我很困惑我应该在哪里保存该文件然后删除它。

But i am confused where should i save that file and then delete it.

是否有任何临时位置文件在用户会话后自动删除

Is there any temp location where files automatically gets deleted after user session

推荐答案

Python具有 tempfile模块完全是为了这个目的。您不需要担心文件的位置/删除，它适用于所有支持的平台。

Python has tempfile module for exactly this purpose. You do not need to worry about the location/deletion of the file, it works on all supported platforms.

有三种类型的临时文件：

There are three types of temporary files:

• tempfile.TemporaryFile - 只是基本的临时文件，


• tempfile.NamedTemporaryFile - 此功能与 TemporaryFile（）完全相同，但文件保证在文件系统中有一个可见的名称（在Unix上，目录条目不被取消链接），该名称可以从文件对象的name属性中检索。


• tempfile.SpooledTemporaryFile - 此功能与 TemporaryFile（）完全相同，只是数据是在内存中假脱机，直到文件大小超过 max_size ，或直到调用文件的 fileno（）方法为止内容写入磁盘，操作按照 TemporaryFile（）。，

• tempfile.TemporaryFile - just basic temporary file,
• tempfile.NamedTemporaryFile - "This function operates exactly as TemporaryFile() does, except that the file is guaranteed to have a visible name in the file system (on Unix, the directory entry is not unlinked). That name can be retrieved from the name attribute of the file object.",
• tempfile.SpooledTemporaryFile - "This function operates exactly as TemporaryFile() does, except that data is spooled in memory until the file size exceeds max_size, or until the file’s fileno() method is called, at which point the contents are written to disk and operation proceeds as with TemporaryFile().",

编辑：您要求的示例用法可能如下所示：

EDIT: The example usage you asked for could look like this:

>>> with TemporaryFile() as f:
        f.write('abcdefg')
        f.seek(0)  # go back to the beginning of the file
        print(f.read())


abcdefg

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