Get subdomain from URL using Python

urlparse.urlparse will split the URL into protocol, location, port, etc. You can then split the location by . to get the subdomain.

import urlparse
url = urlparse.urlparse(address)
subdomain = url.hostname.split('.')[0]

Package tldextract makes this task very easy, and then you can use urlparse as suggested if you need any further information:

>>> import tldextract
>>> tldextract.extract("http://lol1.domain.com:8888/some/page"
ExtractResult(subdomain='lol1', domain='domain', suffix='com')
>>> tldextract.extract("http://sub.lol1.domain.com:8888/some/page"
ExtractResult(subdomain='sub.lol1', domain='domain', suffix='com')
>>> urlparse.urlparse("http://sub.lol1.domain.com:8888/some/page")
ParseResult(scheme='http', netloc='sub.lol1.domain.com:8888', path='/some/page', params='', query='', fragment='')

Note that tldextract properly handles sub-domains.