python open表示文件不存在 [英] Python open says file doesn't exist when it does

问题描述

我正在尝试弄清楚为什么我的Python open调用说一个文件不存在.如果我在浏览器中输入完全相同的文件URL，则会显示照片.

I am trying to work out why my Python open call says a file doesn't exist when it does. If I enter the exact same file url in a browser the photo appears.

我收到的错误消息是:

No such file or directory: 'https://yhistory.s3.amazonaws.com/media/userphotos/1_1471378042183_cdv_photo_033.jpg'

Python代码是:

The Python code is:

full_path_filename = 'https://' + settings.AWS_STORAGE_BUCKET_NAME + '.s3.amazonaws.com/' + file_name
fd_img = open(full_path_filename, 'r')

我想知道这个问题是否与AWS S3存储桶中的文件有关，但是我能够连接到存储桶并列出其内容.

I was wondering if this problem is something to do with the file being in an AWS S3 bucket but I am able to connect to the bucket and list its contents.

推荐答案

如果您尝试通过Internet打开文件，则应执行以下操作(假设您使用的是python 3):

If you are trying to open a file over internet you should do something like this (assuming that you are using python 3):

import urllib.request
full_path_filename = 'https://' + settings.AWS_STORAGE_BUCKET_NAME + '.s3.amazonaws.com/' + file_name

file = urllib.request.urlopen(full_path_filename)

这将下载实际文件.您可以将 file 用作另一个文件，例如object.

This will download the actual file. You can use file as an another file like object.

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