import re
s2 = 'H: 1234.34.34 12.12 123.5'
myRegex = r'\bH: (\d+(?:\.\d+)+(?: \d+(?:\.\d+)+)*)\b'
res = re.search(myRegex , s2)
if res:
print(res.group(1).split())
aW1wb3J0IHJlCgpzMiA9ICdIOiAxMjM0LjM0LjM0IDEyLjEyIDEyMy41JwpteVJlZ2V4ID0gcidcYkg6IChcZCsoPzpcLlxkKykrKD86IFxkKyg/OlwuXGQrKSspKilcYicKCnJlcyA9IHJlLnNlYXJjaChteVJlZ2V4ICwgczIpCmlmIHJlczoKICAgIHByaW50KHJlcy5ncm91cCgxKS5zcGxpdCgpKQo=