Get subdomain from URL using Python

Question

For example, the address is:

Address = http://lol1.domain.com:8888/some/page

Answer 1

tldextract separate the TLD from the registered domain and subdomains of a URL.

Installation

pip install tldextract

For the current question:

import tldextract

address = 'http://lol1.domain.com:8888/some/page'
domain = tldextract.extract(address).domain
print("Extracted domain name : ", domain)

The output:

Extracted domain name :  domain

In addition, there is a number of examples which is extremely related with the usage of tldextract.extract side.

Answer 2

For extracting the hostname, I'd use urlparse from urllib2:

>>> from urllib2 import urlparse
>>> a = "http://lol1.domain.com:8888/some/page"
>>> urlparse.urlparse(a).hostname
'lol1.domain.com'

As to how to extract the subdomain, you need to cover for the case that there FQDN could be longer. How you do this would depend on your purposes. I might suggest stripping off the two right most components.

E.g.

>>> urlparse.urlparse(a).hostname.rpartition('.')[0].rpartition('.')[0]
'lol1'