如何在 PyMongo 中打开 GridFS 中文件的 GridOut 实例？

发布于 2024-12-14 02:13:54 字数 858 浏览 0 评论 0原文

假设我有一个 pdf 文件，我想在系统默认的 pdf 应用程序中的 Python 脚本中打开该文件。

首先，如果它保存在常规文件系统中，我只需像这样打开它：

import os
os.system('Open /Users/Doe/Documents/mypdf.pdf')

其次，如果我想将 pdf 文件存储在 GridFS 中，我可以像这样写入 GridFS：

from pymongo import Connection
from gridfs import GridFS
db = Connection().text_database
fs = GridFS(db)
with open('/Users/Doe/Documents/mypdf.pdf') as mypdf: 
    oid = fs.put(mypdf)

然后我可以像这样读取文件：

myfile = fs.get(oid)

但是我该如何做最后一步，即如何在系统默认的pdf应用程序中打开pdf文件？

编辑：

现在我将 GridOut 实例写入临时文件，然后打开该临时文件。最好跳过写入文件系统的额外步骤。

import tempfile
temp_path = tempfile.mkdtemp()
with open(os.path.join(temp_path, myfile.filename), 'w') as f:
    f.write(myfile.read())
os.system('open {}'.format(os.path.join(temp_path, myfile.filename)))

原文

Let's say I have a pdf file that I want to open in a Python script in the systems's default application for pdfs.

First, if it's kept in the regular file system I would simply open it like this:

import os
os.system('Open /Users/Doe/Documents/mypdf.pdf')

Second, if I want to store the pdf file in a GridFS, I can write to the GridFS like this:

from pymongo import Connection
from gridfs import GridFS
db = Connection().text_database
fs = GridFS(db)
with open('/Users/Doe/Documents/mypdf.pdf') as mypdf: 
    oid = fs.put(mypdf)

I can then read the file like this:

myfile = fs.get(oid)

But how can I do the last step, that is, how can I open the pdf file in the in the systems's default application for pdfs?

EDIT:

Now I am writing the GridOut instance to a temporary file, and then opening that temporary file. It would be nice to skip that extra step of writing to the file system.

import tempfile
temp_path = tempfile.mkdtemp()
with open(os.path.join(temp_path, myfile.filename), 'w') as f:
    f.write(myfile.read())
os.system('open {}'.format(os.path.join(temp_path, myfile.filename)))

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