[Python] How to match numbers that don't contain decimal point using python regex only

I have an input string "10 3.14 5 2.718" and want to get the output ["10", "5"] using regex only.

I tried Gemini and Copilot but both couldn't produce the right output as their proposed solutions keep using \b in the regex pattern, no matter how many times I prompt their solutions don't work. Problem is decimal point also works as a word boundary (\b).

My code as below:

import re
text = "10 3.14 5 2.718"
pattern = r"\d+(?!\.\d+)"
matches = re.findall(pattern, text)
print(matches)

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