import re
text = """unit 3 {
arp-options {
aging-timer 5;
}
family inet4 {
address 2.33.1.2/255.255.255.0;
address 2.33.2.2/255.255.255.0;
address 2.33.3.2/255.255.255.0;
address 2.33.4.2/255.255.255.0;
}
}"""
m = re.search(r"family inet4\s*{([^{}]*)}", text)
if m:
res = [x.strip().split()[-1].strip(';') for x in m.group(1).strip().splitlines()]
print(res)
aW1wb3J0IHJlCgp0ZXh0ID0gIiIidW5pdCAzIHsKICAgIGFycC1vcHRpb25zIHsKICAgICAgICBhZ2luZy10aW1lciA1OwogICAgfQogICAgZmFtaWx5IGluZXQ0IHsKICAgICAgICBhZGRyZXNzIDIuMzMuMS4yLzI1NS4yNTUuMjU1LjA7CiAgICAgICAgYWRkcmVzcyAyLjMzLjIuMi8yNTUuMjU1LjI1NS4wOwogICAgICAgIGFkZHJlc3MgMi4zMy4zLjIvMjU1LjI1NS4yNTUuMDsKICAgICAgICBhZGRyZXNzIDIuMzMuNC4yLzI1NS4yNTUuMjU1LjA7CiAgICB9Cn0iIiIKCm0gPSByZS5zZWFyY2gociJmYW1pbHkgaW5ldDRccyp7KFtee31dKil9IiwgdGV4dCkKaWYgbToKCXJlcyA9IFt4LnN0cmlwKCkuc3BsaXQoKVstMV0uc3RyaXAoJzsnKSBmb3IgeCBpbiBtLmdyb3VwKDEpLnN0cmlwKCkuc3BsaXRsaW5lcygpXQoJcHJpbnQocmVzKQ==