排除findAll结果集

Question

我试图从一个findAll在美丽的汤排除某些结果。我试图排除具有media=print属性的样式表链接

下面是我的代码:

from bs4 import BeautifulSoup
import urllib2
url = "http://worldwildlife.org/"
request = urllib2.Request(url)
opener = urllib2.build_opener()
f = opener.open(request)
html = f.read()
soup = BeautifulSoup(html)
css_files = soup.findAll('link',{'rel':'stylesheet'})
print css_files

的回报:

[<link href="/assets/application-b275a30a2c6726e3fabb10517f7cb812.css" media="all" rel="stylesheet" type="text/css"/>, <link href="/assets/print-f0ba9e9b867691bb2fea40b2ab4e78d7.css" media="print" rel="stylesheet" type="text/css"/>]

我已经尝试了各种方法，我显然是python的新手，任何帮助将不胜感激。

Answer 1

修改搜索行为:

css_files = soup.findAll('link',{'rel':'stylesheet', 'media': lambda L: L != 'print'})
# [<link href="/assets/application-b275a30a2c6726e3fabb10517f7cb812.css" media="all" rel="stylesheet" type="text/css"/>]