将HH:MM:SS AM/PM对象列转换为秒

def time_to_seconds(time_str):
    # 拆分时间字符串
    time_parts = time_str.split(':')
    hour = int(time_parts[0])
    minute = int(time_parts[1])
    second = int(time_parts[2].split()[0])  # 去除AM/PM部分

    # 处理AM/PM
    if time_parts[2].split()[1] == 'PM':
        hour += 12

    # 计算总秒数
    total_seconds = hour * 3600 + minute * 60 + second
    return total_seconds

# 示例用法
time_str = '09:30:45 AM'
seconds = time_to_seconds(time_str)
print(seconds)