排除findAll結果集

Question

我試圖從findAll排除某些結果在美麗的湯。我想排除有媒體=打印屬性

這裏的樣式表的鏈接是我的代碼：

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 

回報：

[<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"/>] 

我已經試過各種方法，我很明顯新python任何幫助將不勝感激。

Answer 1

修改您的搜索線爲：

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"/>]