python:regex只获取最后一次出现

import re

text = "This is a test string. This is another test string."
pattern = r"test"

matches = re.findall(pattern, text)
last_match = matches[-1]

print(last_match)

import re

text = "This is a test string. This is another test string."
pattern = r"test.*"

match = re.search(pattern, text)
last_match = match.group()

print(last_match)

import re

text = "This is a test string. This is another test string."
pattern = r"test"

matches = re.finditer(pattern, text)
last_match = None

for match in matches:
    last_match = match.group()

print(last_match)