pythonic way to extract string from this list

Question

if I have a list ['default via 192.168.0.1 dev wlan0 proto static \n', '192.168.0.0/24 dev wlan0 proto kernel scope link src 192.168.0.11 \n'] what will be the most pythonic way to extract 192.168.0.1 and 192.168.0.11 out of it

Answer 1

Try this using regular expressions, where lst is the list with the data:

import re
pat = re.compile(r'\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}[^/]')
[pat.search(s).group(0) for s in lst]
=> ['192.168.0.1', '192.168.0.11']

The above assumes that there's a valid IPv4 IP in each string in the list, and that after the IP there isn't a / character.