如何在由正则表达式标识的两个特定列表位置之间连接列表的元素(字符串)？

import re

def connect_elements_between_positions(list, regex):
    result = ""

    start_position = None
    end_position = None

    for i, element in enumerate(list):
        if re.match(regex, element):
            if start_position is None:
                start_position = i
            else:
                end_position = i
                break

    if start_position is not None and end_position is not None:
        for i in range(start_position + 1, end_position):
            result += list[i]

    return result

# 示例用法
my_list = ["apple", "banana", "car", "dog", "elephant", "fish", "grape"]
my_regex = r"b.*g"
result = connect_elements_between_positions(my_list, my_regex)
print(result)  # 输出：anacar