In this tutorial, you'll walk through the main steps of the web scraping process. You'll learn how to write a script that uses Python's requests library to scrape data from a website. You'll also use Beautiful Soup to extract the specific pieces of information that you're interested in. Web scraping python beautifulsoup tutorial with example: The data present are unstructured and web scraping will help to collect data and store it. There are many ways of scraping websites and online services. Use the API of the website. Example, Facebook has the Facebook Graph API and allows retrieval of data posted on Facebook. Learn web scraping with Python with this step-by-step tutorial. We will cover almost all of the tools Python offers to scrape the web. From Requests to BeautifulSoup, Scrapy, Selenium and more.
- Python Web Scraping Beautifulsoup Example Code
- Python 3 Web Scraping
- Using Beautifulsoup Python
- Python Web Scraping Beautifulsoup Example Program
- Python Web Scraping Beautifulsoup Example Html
last modified July 27, 2020
But we can automate the above examples in Python with Beautiful Soup module. Dos and don’ts of web scraping. Web scraping is legal in one context and illegal in another context. For example, it is legal when the data extracted is composed of directories and telephone listing for personal use.
Python BeautifulSoup tutorial is an introductory tutorial to BeautifulSoup Python library.The examples find tags, traverse document tree, modify document, and scrape web pages.
BeautifulSoup
BeautifulSoup is a Python library for parsing HTML and XML documents. It is often usedfor web scraping. BeautifulSoup transforms a complex HTML document into a complextree of Python objects, such as tag, navigable string, or comment.
Installing BeautifulSoup
We use the
pip3
command to install the necessary modules.Download torrent for mac pro. Mac OS X El Capitan: Being the 12th major release of macOS, Mac OS X El Capitan belongs to the Macintosh-Unix family of OS.
We need to install the
lxml
module, which is usedby BeautifulSoup.BeautifulSoup is installed with the above command.
The HTML file
In the examples, we will use the following HTML file:
index.html
Python BeautifulSoup simple example
In the first example, we use BeautifulSoup module to get three tags.
The code example prints HTML code of three tags.
We import the
BeautifulSoup
class from the bs4
module. The BeautifulSoup
is the main class for doing work.We open the
index.html
file and read its contentswith the read
method.A
BeautifulSoup
object is created; the HTML data is passed to theconstructor. The second option specifies the parser.Here we print the HTML code of two tags:
h2
and head
.There are multiple
li
elements; the line prints the first one.This is the output.
BeautifulSoup tags, name, text
The
name
attribute of a tag gives its name andthe text
attribute its text content.tags_names.py
The code example prints HTML code, name, and text of the
h2
tag.This is the output.
BeautifulSoup traverse tags
With the
recursiveChildGenerator
method we traverse the HTML document.![Python Web Scraping Beautifulsoup Example Python Web Scraping Beautifulsoup Example](/uploads/1/1/4/2/114243007/146837309.png)
The example goes through the document tree and prints thenames of all HTML tags.
In the HTML document we have these tags.
BeautifulSoup element children
With the
children
attribute, we can get the childrenof a tag.get_children.py
The example retrieves children of the
html
tag, places theminto a Python list and prints them to the console. Since the children
attribute also returns spaces between the tags, we add a condition to includeonly the tag names.The
html
tags has two children: head
and body
.BeautifulSoup element descendants
With the
descendants
attribute we get all descendants (children of all levels)of a tag.The example retrieves all descendants of the
body
tag.These are all the descendants of the
body
tag.BeautifulSoup web scraping
Requests is a simple Python HTTP library. It provides methods foraccessing Web resources via HTTP.
scraping.py
The example retrieves the title of a simple web page. It alsoprints its parent.
We get the HTML data of the page.
Python Web Scraping Beautifulsoup Example Code
We retrieve the HTML code of the title, its text, and the HTML codeof its parent.
This is the output.
BeautifulSoup prettify code
With the
prettify
method, we can make the HTML code look better.We prettify the HTML code of a simple web page.
This is the output.
BeautifulSoup scraping with built-in web server
We can also serve HTML pages with a simple built-in HTTP server.
We create a
public
directory and copy the index.html
there. Then we start the Python HTTP server.
Python 3 Web Scraping
scraping2.py
Now we get the document from the locally running server.
BeautifulSoup find elements by Id
With the
find
method we can find elements by various meansincluding element id.The code example finds
ul
tag that has mylist
id.The commented line has is an alternative way of doing the same task.BeautifulSoup find all tags
With the
find_all
method we can find all elements that meetsome criteria.find_all.py
The code example finds and prints all
li
tags.This is the output.
The
find_all
method can take a list of elementsto search for.The example finds all
h2
and p
elementsand prints their text.The
find_all
method can also take a function which determineswhat elements should be returned.find_by_fun.py
The example prints empty elements.
The only empty element in the document is
meta
.It is also possible to find elements by using regular expressions.
Using Beautifulsoup Python
The example prints content of elements that contain 'BSD' string.
Python Web Scraping Beautifulsoup Example Program
This is the output.
BeautifulSoup CSS selectors
With the
select
and select_one
methods, we can usesome CSS selectors to find elements.select_nth_tag.py
This example uses a CSS selector to print the HTML code of the third
li
element.This is the third
li
element.The # character is used in CSS to select tags by theirid attributes.
The example prints the element that has
mylist
id.BeautifulSoup append element
The
append
method appends a new tag to the HTML document.append_tag.py
The example appends a new
li
tag.First, we create a new tag with the
new_tag
https://xzkebyo.weebly.com/fighting-games-for-mac-download.html. method.Python Web Scraping Beautifulsoup Example Html
We get the reference to the
ul
tag.We append the newly created tag to the
ul
tag.We print the
ul
tag in a neat format.BeautifulSoup insert element
The
insert
method inserts a tag at the specified location.The example inserts a
li
tag at the thirdposition into the ul
tag.BeautifulSoup replace text
The
replace_with
replaces a text of an element.replace_text.py
The example finds a specific element with the
find
method andreplaces its content with the replace_with
method.BeautifulSoup remove element
The
decompose
method removes a tag from the tree and destroys it.The example removes the second
p
element.In this tutorial, we have worked with the Python BeautifulSoup library.
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