Python：从FTP服务器下载文件 [英] Python: download a file from an FTP server

问题描述

我正在尝试下载一些公共数据文件。我通过抓屏来获取文件的链接，这些文件看起来都像这样：

I'm trying to download some public data files. I screenscrape to get the links to the files, which all look something like this:

ftp://ftp.cdc.gov/pub/Health_Statistics/NCHS/nhanes/2001-2002/L28POC_B.xpt

我在请求库网站上找不到任何文档。

I can't find any documentation on the Requests library website.

推荐答案

请求库不支持ftp链接。

requests library doesn't support ftp links.

要从FTP服务器下载文件，您可以：

To download a file from FTP server you could:

import urllib 

urllib.urlretrieve('ftp://server/path/to/file', 'file')
# if you need to pass credentials:
#   urllib.urlretrieve('ftp://username:password@server/path/to/file', 'file')

或：

import shutil
import urllib2
from contextlib import closing

with closing(urllib2.urlopen('ftp://server/path/to/file')) as r:
    with open('file', 'wb') as f:
        shutil.copyfileobj(r, f)

Python3：

import shutil
import urllib.request as request
from contextlib import closing

with closing(request.urlopen('ftp://server/path/to/file')) as r:
    with open('file', 'wb') as f:
        shutil.copyfileobj(r, f)

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