Extracting an attribute value with beautifulsoup

Posted on

Solving problem is about exposing yourself to as many situations as possible like Extracting an attribute value with beautifulsoup and practice these strategies over and over. With time, it becomes second nature and a natural way you approach any problems in general. Big or small, always start with a plan, use other strategies mentioned here till you are confident and ready to code the solution.
In this post, my aim is to share an overview the topic about Extracting an attribute value with beautifulsoup, which can be followed any time. Take easy to follow this discuss.

Extracting an attribute value with beautifulsoup

I am trying to extract the content of a single “value” attribute in a specific “input” tag on a webpage. I use the following code:

import urllib
f = urllib.urlopen("http://58.68.130.147")
s = f.read()
f.close()
from BeautifulSoup import BeautifulStoneSoup
soup = BeautifulStoneSoup(s)
inputTag = soup.findAll(attrs={"name" : "stainfo"})
output = inputTag['value']
print str(output)

I get a TypeError: list indices must be integers, not str

even though from the Beautifulsoup documentation i understand that strings should not be a problem here… but i a no specialist and i may have misunderstood.

Any suggestion is greatly appreciated!
Thanks in advance.

Asked By: Barnabe

||

Answer #1:

.find_all() returns list of all found elements, so:

input_tag = soup.find_all(attrs={"name" : "stainfo"})

input_tag is a list (probably containing only one element). Depending on what you want exactly you either should do:

output = input_tag[0]['value']

or use .find() method which returns only one (first) found element:

input_tag = soup.find(attrs={"name": "stainfo"})
output = input_tag['value']
Answered By: ?ukasz

Answer #2:

In Python 3.x, simply use get(attr_name) on your tag object that you get using find_all:

xmlData = None
with open('conf//test1.xml', 'r') as xmlFile:
    xmlData = xmlFile.read()
xmlDecoded = xmlData
xmlSoup = BeautifulSoup(xmlData, 'html.parser')
repElemList = xmlSoup.find_all('repeatingelement')
for repElem in repElemList:
    print("Processing repElem...")
    repElemID = repElem.get('id')
    repElemName = repElem.get('name')
    print("Attribute id = %s" % repElemID)
    print("Attribute name = %s" % repElemName)

against XML file conf//test1.xml that looks like:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<root>
    <singleElement>
        <subElementX>XYZ</subElementX>
    </singleElement>
    <repeatingElement id="11" name="Joe"/>
    <repeatingElement id="12" name="Mary"/>
</root>

prints:

Processing repElem...
Attribute id = 11
Attribute name = Joe
Processing repElem...
Attribute id = 12
Attribute name = Mary
Answered By: amphibient

Answer #3:

If you want to retrieve multiple values of attributes from the source above, you can use findAll and a list comprehension to get everything you need:

import urllib
f = urllib.urlopen("http://58.68.130.147")
s = f.read()
f.close()
from BeautifulSoup import BeautifulStoneSoup
soup = BeautifulStoneSoup(s)
inputTags = soup.findAll(attrs={"name" : "stainfo"})
### You may be able to do findAll("input", attrs={"name" : "stainfo"})
output = [x["stainfo"] for x in inputTags]
print output
### This will print a list of the values.
Answered By: Margath

Answer #4:

I would actually suggest you a time saving way to go with this assuming that you know what kind of tags have those attributes.

suppose say a tag xyz has that attritube named “staininfo”..

full_tag = soup.findAll("xyz")

And i wan’t you to understand that full_tag is a list

for each_tag in full_tag:
    staininfo_attrb_value = each_tag["staininfo"]
    print staininfo_attrb_value

Thus you can get all the attrb values of staininfo for all the tags xyz

Answered By: b1tchacked

Answer #5:

you can also use this :

import requests
from bs4 import BeautifulSoup
import csv
url = "http://58.68.130.147/"
r = requests.get(url)
data = r.text
soup = BeautifulSoup(data, "html.parser")
get_details = soup.find_all("input", attrs={"name":"stainfo"})
for val in get_details:
    get_val = val["value"]
    print(get_val)
Answered By: Mr.Bones

Answer #6:

I am using this with Beautifulsoup 4.8.1 to get the value of all class attributes of certain elements:

from bs4 import BeautifulSoup
html = "<td class='val1'/><td col='1'/><td class='val2' />"
bsoup = BeautifulSoup(html, 'html.parser')
for td in bsoup.find_all('td'):
    if td.has_attr('class'):
        print(td['class'][0])

Its important to note that the attribute key retrieves a list even when the attribute has only a single value.

Answered By: PeterXX

Answer #7:

For me:

<input id="color" value="Blue"/>

This can be fetched by below snippet.

page = requests.get("https://www.abcd.com")
soup = BeautifulSoup(page.content, 'html.parser')
colorName = soup.find(id='color')
print(color['value'])
Answered By: vijayraj34

Answer #8:

You could try to use the new powerful package called requests_html:

from requests_html import HTMLSession
session = HTMLSession()
r = session.get("https://www.bbc.co.uk/news/technology-54448223")
date = r.html.find('time', first = True) # finding a "tag" called "time"
print(date)  # you will have: <Element 'time' datetime='2020-10-07T11:41:22.000Z'>
# To get the text inside the "datetime" attribute use:
print(date.attrs['datetime']) # you will get '2020-10-07T11:41:22.000Z'
Answered By: Yasser Mustafa

Leave a Reply

Your email address will not be published.