Regex to match key in YAML

Question

I have a yaml which looks like this..! User can define N number of xyz_flovor_id where _flovor_id key will be common. Aim is to grab *_flavor

Answer 1

You need this regex. I grouped it to key-value pair:

^\s*(?P\w+_flavor_id):\s*(?P\d+)

Python demo: https://repl.it/Lk5W/0

import re

regex = r"^\s*(?P\w+_flavor_id):\s*(?P\d+)"

test_str = ("  server:\n"
    "    tenant: \"admin\"\n"
    "    availability_zone: \"nova\"\n"
    "    cpu_overcommit_ratio: 1:1\n"
    "    memory_overcommit_ratio: 1:1\n"
    "    xyz_flavor_id: 1\n"
    "    abc_flavor_id: 2\n")

matches = re.finditer(regex, test_str, re.MULTILINE)

for matchNum, match in enumerate(matches):
    print ("{key}:{value}".format(key = match.group('key'), value=match.group('value')))