您可以使用\w+\-(\d+)：

>>> import re
>>> s = """(jack-9) - london
... (neil-11) - india"""
>>> re.findall("\w+\-(\d+)", s, re.MULTILINE)
['9', '11']

您可以使用(?!-)\d+\b执行此操作
(?!)为负先行，\b为字边界

import re

regex = r"(?!-)\d+\b"

test_str = ("(jack-9) - london\n"
    "(neil-11) - india")

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

for matchNum, match in enumerate(matches, start=1):
    
    print ("Match {matchNum} : {match}".format(matchNum = matchNum, match = match.group()))

Regex demo here