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Extract_the_domain_name_from_a_URL.py
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Extract_the_domain_name_from_a_URL.py
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# Kata link:
# https://www.codewars.com/kata/514a024011ea4fb54200004b/
# -------------------------------------
# Instructions:
'''
Write a function that when given a URL as a string, parses out just the domain name and returns it as a string. For example:
domain_name("http://github.com/carbonfive/raygun") == "github"
domain_name("http://www.zombie-bites.com") == "zombie-bites"
domain_name("https://www.cnet.com") == "cnet"
'''
# -------------------------------------
import re
# Solution 1:
def domain_name(url):
string = re.sub(r"^(.+://|w+\.)","", url)
if 'www.' in string:
return domain_name(string)
string = re.sub(r"(\..+)$", "", string)
return string
# Solution 2:
# def domain_name(url):
# url = url.replace('www.', "")
# return url[url.find("//") + 2:url.find(".")]
# -------------------------------------
# Basic Tests
print(domain_name("http://google.com"), " ## google")
print(domain_name("http://google.co.jp"), " ## google")
print(domain_name("http://www.Codewars.com"), " ## Codewars")
print(domain_name("www.xakep.ru"), " ## xakep")
print(domain_name("https://youtube.com"), " ## youtube")