如何将MM::SS字符串转换为时间格式并对其进行操作

import datetime

def convert_mmss_to_time(mmss_string):
    minutes, seconds = mmss_string.split("::")
    minutes = int(minutes)
    seconds = int(seconds)
    
    time_obj = datetime.datetime(1, 1, 1, 0, 0, 0)  # 创建一个日期时间对象，小时、分钟和秒钟设置为0
    
    time_obj = time_obj.replace(minute=minutes, second=seconds)  # 设置分钟和秒钟的值
    
    return time_obj

# 示例用法
mmss_string = "05::30"
time_obj = convert_mmss_to_time(mmss_string)
print(time_obj)  # 输出：1900-01-01 00:05:30

# 对时间进行操作的示例
new_time_obj = time_obj + datetime.timedelta(minutes=10)  # 增加10分钟
print(new_time_obj)  # 输出：1900-01-01 00:15:30