How to get host name from URL using Python

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Launch your preferred Python shell.

$ ipython3
Python 3.8.2 (default, Apr 27 2020, 15:53:34)
Type 'copyright', 'credits' or 'license' for more information
IPython 7.13.0 -- An enhanced Interactive Python. Type '?' for help.

Import urllib.parse module.

In [1]: import urllib.parse

Parse URL using urlparse function from urllib.parse module.

In [2]: parsed_url = urllib.parse.urlparse('https://www.example.com/page.html')

Print out parsed URL output.

In [3]: print(parsed_url)
ParseResult(scheme='https', netloc='www.example.com', path='/page.html', params=//, query=//, fragment=//)

Select required output and process accordingly.

In [4]: print(parsed_url.netloc)
www.example.com

Create a Python script that accepts a URL as parameter and outputs corresponding parsed URL .

get-host-name-from-url.py

#!/usr/bin/env python3
import urllib.parse
import sys
url = sys.argv[1]
parsed_url = urllib.parse.urlparse(url)
print(parsed_url)
print("Host name: ", parsed_url.netloc)

Run the script from the command with URL as parameter.

$ python3 get-host-name-from-url.py https://www.example.com/page.html
ParseResult(scheme='https', netloc='www.example.com', path='/page.html', params=//, query=//, fragment=//)
Host name:  www.example.com