爬虫之css选择器

用soup.select方法

# panel节点内部的panel—heading节点
print(soup.select('.panel .panel-heading')) 
# ul里面的li    
print(soup.select('ul li'))   
# id为list-2的内部element节点                  
print(soup.select('#list-2 .element'))          
print(type(soup.select('ul')[0]))
# ul下的li
print(soup.select('ul>li'))                       

# 获取属性
for ul in soup.select('ul'):
    print(ul['id'])
    print(ul.attrs['id'])

# 获取文本
for li in soup.select('li'):
    print('Get Text:', li.get_text())
    print('String:', li.string)