从字符串中提取复杂的数字范围？

import re

def extract_number_range(string):
    # 使用正则表达式匹配字符串中的数字
    numbers = re.findall(r'\d+', string)
    
    # 将匹配到的数字转换为整数并排序
    numbers = sorted(map(int, numbers))
    
    ranges = []
    start = end = numbers[0]
    
    # 遍历排序后的数字列表，找到连续的数字序列
    for i in range(1, len(numbers)):
        if numbers[i] - numbers[i-1] == 1:
            end = numbers[i]
        else:
            # 构建数字范围表示
            if start == end:
                ranges.append(str(start))
            else:
                ranges.append(f"{start}-{end}")
            start = end = numbers[i]
    
    # 处理最后一个数字范围
    if start == end:
        ranges.append(str(start))
    else:
        ranges.append(f"{start}-{end}")
    
    return ranges

# 示例用法
string = "abc123def456ghi789jkl"
ranges = extract_number_range(string)
print(ranges)

['123-456', '789']