Question

I need a regex that will give me the following results from each example and I can’t seem to get it right:

example.com yields -> nothing / empty

www.example.com yields -> nothing / empty

account.example.com yields -> account

mywww.example.com yields -> mywww

wwwboys.example.com yields -> wwwboys

cool-www.example.com yields -> cool-www

So, it doesn’t matter if they use ‘www’ in the subdomain, but it can’t be only ‘www’. It can also contain hyphens.

Answer 1

mystrings="""
example.com
www.example.com
account.example.com
mywww.example.com
wwwboys.example.com
cool-www.example.com
"""

junk=["example.com","www.example.com"]
for url in mystrings.split("\n"):
    if url and not url.strip() in junk:
       print "-->",url.split(".",2)[0]

output

$ ./python.py
--> account
--> mywww
--> wwwboys
--> cool-www