Python的下载图像

我需要找到一个HTML代码类似于此的图像：Python的下载图像

... 
<a href="/example/1"> 
    <img id="img" src="http://example.net/example.jpg" alt="Example" /> 
</a> 
...

我使用LXML和要求。

下面是代码：

import lxml 
from lxml import html 
import requests 

url = 'http://www.example.com' 

r = requests.get(url) 
tree = lxml.html.fromstring(r.content) 

img = tree.get_element_by_id("img") 
f = open("image.jpg",'wb') 
f.write(requests.get(img['src']).content)

但我得到一个错误：

Traceback (most recent call last): 
    File "/Users/Name/Documents/Python/Example/Script.py", line 13, in <module> 
    s = requests.get(img['src']) 
    File "/Library/Python/2.6/site-packages/lxml/lxml.etree.pyx", line 1052, in lxml.etree._Element.__getitem__ (src/lxml/lxml.etree.c:38272) 
TypeError: 'str' object cannot be interpreted as an index

建议？

来源

2012-07-19 Jiloc

建议：阅读文档，并请固定的HTML。 – dav1d 2012-07-19 18:24:34

尝试f.write(requests.get(img.attrib['src']).content)

来源

2012-07-19 20:47:55 asciimoo

import lxml.html 
import requests 

url = 'http://www.example.com/' 
tree = lxml.html.parse(url) 
img = tree.get_element_by_id('img') 
img_url = img.attrib['src'] 

with open('image.jpg', 'wb') as outf: 
    data = requests.get(img_url).content 
    outf.write(data)

来源

2012-07-19 22:42:44

IMG = tree.get_element_by_id（ 'IMG'）它不工作这一次，它说：回溯（最近通话最后一个）：文件“/Users/Example/Documents/Python/Example/Script.py ”，第6行，在 IMG = tree.get_element_by_id（ 'IMG'） AttributeError的： 'lxml.etree._ElementTree' 对象没有属性 'get_element_by_id' 我试图替代树= lxml.html.parse（URL ）与 tree = lxml.html.fromstring（requests.get（url）.content）现在它的工作原理，感谢您的帮助！ – Jiloc 2012-07-20 00:26:57

Python的下载图像

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