对同一字符串中每个字符串旁边的数字求和并求平均值

def calculate_average(string):
    total_sum = 0
    count = 0

    i = 0
    while i < len(string):
        if string[i].isdigit():
            num_str = ""
            while i < len(string) and string[i].isdigit():
                num_str += string[i]
                i += 1
            total_sum += int(num_str)
            count += 1
        else:
            i += 1

    if count > 0:
        average = total_sum / count
        return average
    else:
        return 0

# 示例用法
string = "abc123def456ghi789"
average = calculate_average(string)
print("平均值：", average)