创新互联www.cdcxhl.cn八线动态BGP香港云服务器提供商，新人活动买多久送多久，划算不套路！
10年积累的做网站、
成都网站制作经验，可以快速应对客户对网站的新想法和需求。提供各种问题对应的解决方案。让选择我们的客户得到更好、更有力的网络服务。我虽然不认识你，你也不认识我。但先
网站设计后付款的网站建设流程，更有
竞秀免费网站建设让你可以放心的选择与我们合作。
Python爬虫如何使用CSS选择器？针对这个问题，这篇文章详细介绍了相对应的分析和解答，希望可以帮助更多想解决这个问题的小伙伴找到更简单易行的方法。
CSS选择器
这是另一种与find_all()方法有异曲同工的查找方法，写CSS时，标签名不加任何修饰，类名前加.，id名前加#。
在这里我们也可以利用类似的方法来筛选元素，用到的方法是soup.select()，返回的类型是list。
（1）通过标签名查找
#!/usr/bin/python3
# -*- coding:utf-8 -*-
from bs4 import BeautifulSoup
html = """
The Dormouse's story
The Dormouse's story
Once upon a time there were three little sisters; and their names were
,
Lacie and
Tillie;
and they lived at the bottom of a well.
...
"""
# 创建 Beautiful Soup 对象，指定lxml解析器
soup = BeautifulSoup(html, "lxml")
print(soup.select("title"))
print(soup.select("b"))
print(soup.select("a"))
运行结果
[The Dormouse's story]
[The Dormouse's story]
[, Lacie, Tillie]
（2）通过类名查找
#!/usr/bin/python3
# -*- coding:utf-8 -*-
from bs4 import BeautifulSoup
html = """
The Dormouse's story
The Dormouse's story
Once upon a time there were three little sisters; and their names were
,
Lacie and
Tillie;
and they lived at the bottom of a well.
...
"""
# 创建 Beautiful Soup 对象，指定lxml解析器
soup = BeautifulSoup(html, "lxml")
print(soup.select(".title"))
运行结果
[The Dormouse's story]
（3）通过id名查找
#!/usr/bin/python3
# -*- coding:utf-8 -*-
from bs4 import BeautifulSoup
html = """
The Dormouse's story
The Dormouse's story
Once upon a time there were three little sisters; and their names were
,
Lacie and
Tillie;
and they lived at the bottom of a well.
...
"""
# 创建 Beautiful Soup 对象，指定lxml解析器
soup = BeautifulSoup(html, "lxml")
print(soup.select("#link1"))
运行结果
[The Dormouse's story]
（4）组合查找
#!/usr/bin/python3
# -*- coding:utf-8 -*-
from bs4 import BeautifulSoup
html = """
The Dormouse's story
The Dormouse's story
Once upon a time there were three little sisters; and their names were
,
Lacie and
Tillie;
and they lived at the bottom of a well.
...
"""
# 创建 Beautiful Soup 对象，指定lxml解析器
soup = BeautifulSoup(html, "lxml")
print(soup.select("p #link1"))
运行结果
[]
（5）属性查找
查找时还可以加入属性元素，属性需要用中括号括起来，注意属性和标签属于同一节点，所以中间不能加空格，否则会无法匹配到。
#!/usr/bin/python3
# -*- coding:utf-8 -*-
from bs4 import BeautifulSoup
html = """
The Dormouse's story
The Dormouse's story
Once upon a time there were three little sisters; and their names were
,
Lacie and
Tillie;
and they lived at the bottom of a well.
...
"""
# 创建 Beautiful Soup 对象，指定lxml解析器
soup = BeautifulSoup(html, "lxml")
print(soup.select("a[class='sister']"))
运行结果
[, Lacie, Tillie]
同样，属性仍然可以与上述查找方式组合，不在同一节点的空格隔开，同一节点的不加空格。
#!/usr/bin/python3
# -*- coding:utf-8 -*-
from bs4 import BeautifulSoup
html = """
The Dormouse's story
The Dormouse's story
Once upon a time there were three little sisters; and their names were
,
Lacie and
Tillie;
and they lived at the bottom of a well.
...
"""
# 创建 Beautiful Soup 对象，指定lxml解析器
soup = BeautifulSoup(html, "lxml")
print(soup.select("p a[class='sister']"))
运行结果
[, Lacie, Tillie]
（6）获取内容
以上的select()方法返回的结果都是列表形式，可以遍历形式输出，然后用get_text()方法来获取它的内容。
#!/usr/bin/python3
# -*- coding:utf-8 -*-
from bs4 import BeautifulSoup
html = """
The Dormouse's story
The Dormouse's story
Once upon a time there were three little sisters; and their names were
,
Lacie and
Tillie;
and they lived at the bottom of a well.
...
"""
# 创建 Beautiful Soup 对象，指定lxml解析器
soup = BeautifulSoup(html, "lxml")
print(soup.select("p a[class='sister']"))
for item in soup.select("p a[class='sister']"):
print(item.get_text())
运行结果
[, Lacie,
Tillie]
Lacie
Tillie
注意：为注释内容，未输出
关于Python爬虫如何使用CSS选择器问题的解答就分享到这里了，希望以上内容可以对大家有一定的帮助，如果你还有很多疑惑没有解开，可以关注创新互联-成都网站建设公司行业资讯频道了解更多相关知识。
新闻名称：Python爬虫如何使用CSS选择器-创新互联
标题来源：
http://chengdu.cdxwcx.cn/article/dgscsp.html
