拆分表示时间的字符串，并以秒为单位提取值

def extract_seconds(time_str):
    # 根据具体的时间表示格式选择相应的分隔符进行拆分
    if ':' in time_str:
        separator = ':'
    elif '-' in time_str:
        separator = '-'
    elif '/' in time_str:
        separator = '/'
    else:
        raise ValueError("Invalid time format")

    # 拆分时间字符串
    time_parts = time_str.split(separator)

    # 将时、分、秒的值转换为秒数
    hours = int(time_parts[0])
    minutes = int(time_parts[1])
    seconds = int(time_parts[2])
    total_seconds = hours * 3600 + minutes * 60 + seconds

    return total_seconds

# 示例用法
time_str = "12:34:56"
seconds = extract_seconds(time_str)
print(seconds)  # 输出：45296