如何在拆分字符串的同时保留分隔符？

import re

def split_and_keep_delimiters(s, delimiter):
    # 使用正则表达式匹配分隔符及其前后的字符
    pattern = r'({})'.format(re.escape(delimiter))
    parts = re.split(pattern, s)
    
    # 将分隔符插入到结果列表中
    result = []
    for i in range(len(parts) - 1):
        result.append(parts[i])
        result.append(delimiter)
    result.append(parts[-1])
    
    return result

# 示例字符串
s = "apple,banana,cherry,date"
delimiter = ","

# 调用函数并打印结果
result = split_and_keep_delimiters(s, delimiter)
print(result)

['apple', ',', 'banana', ',', 'cherry', ',', 'date']