CODEWITHSUNDEEP
python
Marodr
Marodr

Reputation: 177

Python: Split domain name from host name

I have a list of host names as such:

testhost.my.domain.net
host2.domain.net
host3.domain.name.org

basically there can be either 2 or 3 parts in the domain name.

I need to store the host name (testhost, host2, host3) separate from the domain name (my.domain.net, domain.net, and domain.name.org) in a table which is why i am working on splitting the name.

Here is the code I have so far however it does not work because the length of the split can very.

hostname = "practice-host.my.link.com"
split = hostname.split(".")
hostname = split[0]
domain = split[1] + "." + split[2] + "." + split[3] 
print (hostname, domain)

I would like to do something like this,

for i = 1, i < len(split):
domain += split[i] + "."
i += 1

but this of course won't work. Can someone offer a pythonic idea for how to achieve what i need?

Upvotes: 0

Views: 1469

Answers (3)

Mad Physicist
Mad Physicist

Reputation: 114310

You have

name = 'testhost.my.domain.net'
split = name.split('.')

You can get the host as the first element:

host = split[0]

The domain can be recombined with the inverse of split, which is join:

domain = '.'.join(split[1:])

Another way to do it is to only split off on the first occurrence of .:

host, domain = name.split('.', 1)

This version is arguably cleaner but less robust against missing name elements.

Upvotes: 1

sneeu
sneeu

Reputation: 2652

split takes a second argument, maxsplit, which you could set to 1:

domains = [
    "testhost.my.domain.net",
    "host2.domain.net",
    "host3.domain.name.org"
]
split_domains = [d.split(".", 1) for d in domains]

Which will give you:

[
    ['testhost', 'my.domain.net'],
    ['host2', 'domain.net'],
    ['host3', 'domain.name.org']
]

Which is what I think you’re looking for.

Upvotes: 2

Joran Beasley
Joran Beasley

Reputation: 113978

hostname = "www.qq1.com"

domain_name = ".".join(hostname.rsplit(".",2)[-2:])

I guess is what you are asking for?

Upvotes: 0

Related Questions