Learn to do Wikipedia Web scraping using Python, requests, and BeautifulSoup4.
Web scraping (also known as data extraction, web harvesting) is data scraping used for extracting data from websites.
We are using three Modules to do Wikipedia web scraping using Python
Requests module allows you to send HTTP requests using Python
Installation: pip install requests
The built-in string module provides the ability to do complex string operations easier.
BeautifulSoup allows us to scrape information from webpages.
Installation: pip install beautifulsoup4
The internet is an absolutely massive source of data. Unfortunately, the vast majority if it isn’t available in conveniently organized CSV files for download and analysis. If you want to capture data from many websites, you’ll need to try web scraping.
Don’t worry if you’re still a total beginner — in this tutorial we’re going to cover how to do web scraping with Python from scratch, starting with some answers to frequently-asked questions about web scraping.
If you’re already familiar with the concept, feel free to scroll past these and jump right into the tutorial!
Some websites offer data sets that are downloadable in CSV format, or accessible via an Application Programming Interface (API). But many websites with useful data don’t offer these convenient options.
Consider, for example, the National Weather Service’s website. It contains up-to-date weather forecasts for every location in the US, but that weather data isn’t accessible as a CSV or via API. It has to be viewed on the NWS site.
If we wanted to analyze this data, or download it for use in some other app, we wouldn’t want to painstakingly copy-paste everything. Web scraping is a technique that lets us use programming to do the heavy lifting. We’ll write some code that looks at the NWS site, grabs just the data we want to work with, and outputs it in the format we need.
In this tutorial, we’ll show you how to perform web scraping using Python 3 and the Beautiful Soup library. We’ll be scraping weather forecasts from the National Weather Service, and then analyzing them using the Pandas library.
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The Beautiful Soup module is used for web scraping in Python. Learn how to use the Beautiful Soup and Requests modules in this tutorial. After watching, you will be able to start scraping the web on your own.
📺 The video in this post was made by freeCodeCamp.org
The origin of the article: https://www.youtube.com/watch?v=87Gx3U0BDlo&list=PLWKjhJtqVAbnqBxcdjVGgT3uVR10bzTEB&index=12
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When scraping a website with Python, it’s common to use the
Requestslibraries to send
GETrequests to the server in order to receive its information.
However, you’ll eventually need to send some information to the website yourself before receiving the data you want, maybe because it’s necessary to perform a log-in or to interact somehow with the page.
To execute such interactions, Selenium is a frequently used tool. However, it also comes with some downsides as it’s a bit slow and can also be quite unstable sometimes. The alternative is to send a
POSTrequest containing the information the website needs using the request library.
In fact, when compared to Requests, Selenium becomes a very slow approach since it does the entire work of actually opening your browser to navigate through the websites you’ll collect data from. Of course, depending on the problem, you’ll eventually need to use it, but for some other situations, a
POSTrequest may be your best option, which makes it an important tool for your web scraping toolbox.
In this article, we’ll see a brief introduction to the
POSTmethod and how it can be implemented to improve your web scraping routines.
#python #web-scraping #requests #web-scraping-with-python #data-science #data-collection #python-tutorials #data-scraping
Welcome to my Blog, In this article, we will learn python lambda function, Map function, and filter function.
Lambda function in python: Lambda is a one line anonymous function and lambda takes any number of arguments but can only have one expression and python lambda syntax is
Syntax: x = lambda arguments : expression
Now i will show you some python lambda function examples:
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Magic Methods are the special methods which gives us the ability to access built in syntactical features such as ‘<’, ‘>’, ‘==’, ‘+’ etc…
You must have worked with such methods without knowing them to be as magic methods. Magic methods can be identified with their names which start with __ and ends with __ like init, call, str etc. These methods are also called Dunder Methods, because of their name starting and ending with Double Underscore (Dunder).
Now there are a number of such special methods, which you might have come across too, in Python. We will just be taking an example of a few of them to understand how they work and how we can use them.
class AnyClass: def __init__(): print("Init called on its own") obj = AnyClass()
The first example is _init, _and as the name suggests, it is used for initializing objects. Init method is called on its own, ie. whenever an object is created for the class, the init method is called on its own.
The output of the above code will be given below. Note how we did not call the init method and it got invoked as we created an object for class AnyClass.
Init called on its own
Let’s move to some other example, add gives us the ability to access the built in syntax feature of the character +. Let’s see how,
class AnyClass: def __init__(self, var): self.some_var = var def __add__(self, other_obj): print("Calling the add method") return self.some_var + other_obj.some_var obj1 = AnyClass(5) obj2 = AnyClass(6) obj1 + obj2
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