This article describes the Python BeautifulSoup [solution] TypeError: list indices must be integers or slices, not str, text sample code described in great detail, has a certain reference value of learning for all of us to learn or work, a friend in need the following are together with the small series to learn it
emerged in the course of python's Beautiful Soup 4 extended library
TypeError: list indices must be integers or slices, not str
This error, there is analysis of why and how to fix the error.
This error means' wrong type: list the index must be 'integers' or' slices' can not be 'str'
My error code:
#引入库
from bs4 import BeautifulSoup
#读取页面
soup = BeautifulSoup(open('index.html'))
#获取标签
img_tag = div.select("img")
#获取标签属性(这里报错)
src = img_tag['src']
#输出
print(src)
After I found the cause of the error checking comparison
It is obtained when the label is acquired rather than the tag list data
The main reasons are:
The content is acquired and they think there is bias.
That is the difference find () and find_all (), select () and select_one () of.
When
find()
select_one()
When get is a label
type
<class 'bs4.element.Tag'>
It is possible to use the tag [ 'class'] value
When
find_all()
select()
, The group obtained a label (even if there is only one label is set)
type
#find_all()的返回值类型
<class 'bs4.element.ResultSet'>
#select()的返回值类型
<class 'list'>
At this time, we have to first locate the value you need is a list (ResultSet) in the value of the tag
such as tag [0] [ 'class' ]
Solution
one:
#引入库
from bs4 import BeautifulSoup
#读取页面
soup = BeautifulSoup(open('index.html'))
#获取标签
img_tag = div.select("img")
#获取标签属性(这里有改动)
src = img_tag[0]['src']
#输出
print(src)
Because I know the structure of a page can be sure that the label on a bag to get what I needed.
Therefore, using src = img_tag [0] [ ' src'] to obtain attribute information.
Method Two:
#引入库
from bs4 import BeautifulSoup
#读取页面
soup = BeautifulSoup(open('index.html'))
#获取标签
img_tag = div.select_one("img")
#获取标签属性(这里有改动)
src = img_tag['src']
#输出
print(src)
Ibid management, such modifications are also possible success.
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