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Scraping Website: How to Write a Script in Python

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Here's a python script that you can use as a model to scrape a website. Python script The below logic uses BeautifulSoup Package for web scraping. import requests from bs4 import BeautifulSoup url = 'https://www.example.com' response = requests.get(url) soup = BeautifulSoup(response.text, 'html.parser') # Print the title of the webpage print(soup.title.text) # Print all the links in the webpage for link in soup.find_all('a'):     print(link.get('href')) In this script, we first import the Requests and Beautiful Soup libraries. We then define the URL we want to scrape and use the Requests library to send a GET request to that URL. We then pass the response text to Beautiful Soup to parse the HTML contents of the webpage. We then use Beautiful Soup to extract the title of the webpage and print it to the console. We also use a for loop to find all the links in the webpage and print their href attributes to the console. This is just a basic example, but
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How to Use Python Try and Except Logic Correctly

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In Python, you can avoid exceptions using Try and Except logic. The Error-free programs save a lot of time. Also, you can keep away defects in production.
 

Python tips
How to Use Python Try and Except Logic Correctly


In Python, you can handle un-known errors by using TRY and EXCEPT logic. If the programmer does not take care of this, the default is for Python to print an error message and stops execution. 



So the responsibility of a programmer is upfront he/she has to find errors and handle them correctly. It is possible if you use the TRY and EXCEPT.


Python Syntax for Try and Except.


try:
      c = a/b
except:
      c = 1000000

Try ends with ':' it says that Try block start here. In this block, you can write actual logic. The Except: is another block. That means in this block programmer can specify some value. And that value populates when any error happens.

Try and Except Examples.

Example: 1.

Below is the example to give the expected error in except.

try:
      c = a/b
except ZeroDivisionError:
      c = 1000000


The above example is you can give a name to an error in Except.  When this error happens, it assigns 1000000.


Example: 2.

Below is an example to give anticipated errors.

try:
      c = a/b
except (ValueError, ZeroDivisionError):
      c = 1000000


Also, there can be many except statements associated with a single Try.

Example: 3.

Below is an example to use multiple excepts.

try:
      c = a/b
except ValueError:
    c = 0
except ZeroDivisionError:
      c = 1000000

And, as was mentioned, a variable can hold the value of the error to be caught:

Example: 4.

The below example is to assign a value to the variable when an error happens. 

k = ZeroDivisionError
try:
      c = a/b
except k:
      c = 1000000


If we left out the exception name, it assigns value C for other errors.

try:
      c = a/b
except:
      c = 0


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