如何在一定范围内翻转字符的大小写

def flip_case_within_range(string, start, end):
    # 限定范围
    if start < 0:
        start = 0
    if end > len(string):
        end = len(string)
    
    result = ""
    for i in range(len(string)):
        if i >= start and i < end:
            if ord(string[i]) >= 65 and ord(string[i]) <= 90:  # 大写字母
                result += chr(ord(string[i]) + 32)
            elif ord(string[i]) >= 97 and ord(string[i]) <= 122:  # 小写字母
                result += chr(ord(string[i]) - 32)
            else:
                result += string[i]
        else:
            result += string[i]
    
    return result

# 示例用法
original_string = "Hello, World!"
start_index = 3
end_index = 8
flipped_string = flip_case_within_range(original_string, start_index, end_index)
print(flipped_string)  # 输出结果：HelLO, wORld!