如何拆分此字符串，使其将引号和括号放在一起？

import re

def split_string(string):
    pattern = r'(["\(\)])'
    result = re.split(pattern, string)
    return result

# 测试示例
string = 'This is a "sample" string (with parentheses).'
result = split_string(string)
print(result)

['This is a ', '"sample"', ' string ', '(', 'with parentheses', ')', '.']