Python re module's stuff # 1

When you do something with aws, then you need only ip-address from something like this


$ ec2-1-2-3-4.ap-southeast-1.compute.amazonaws.com

I used to deal with it like split something then concat with something. Now I just found something cool in python's re module.

>>> import re

>>> ec2_ip = re.search(r'ec2-(\d+)-(\d+)-(\d+)-(\d+), ).groups()

so I get

>>> print ec2_ip

'1.2.3.4'

yaha, love this.