Robot Framework Match Regexp returns nothing

The script is supposed to get the ip address from the websites given in a txt file. The script works as supposed to up until the Match Regexp part. The Regex itself works as intended when the same code is written in Python.

*** Variables ***
${ipregex}    (\d+).(\d+).(\d+).(\d+)

*** Test Cases ***
Ping Test
  ${filep}=  Get File   webpages.txt
  @{lines}=   Split To Lines  ${filep}
  FOR   ${line}   IN  @{lines}
    ${output}=  Run   ping ${line} -c 1
    ${result}=  Get Regexp Matches  ${output}  ${ipregex}  partial_match=true
    Log   ${result}
  END

I Appreciate any help!

The empty return

Solution

You need to escape the backslash character with another backslash, see the documentation. this example should produce the match you are looking for:

*** Settings ***
Library    String

***Variables***
${output}    PING wh46.go-vip.net (192.0.66.168): 56 data bytes 64 bytes from 192.0.66.168: icmp_seq=0 ttl=54 time=26.800 ms
${ipregex}    ((25[0-5]|(2[0-4]|1\\d|[1-9]|)\\d)\\.?\\b){4}

*** Test Cases ***
test
    ${result}=    Get Regexp Matches    ${output}    ${ipregex}
    Log    ${result}