将以秒为单位的负持续时间转换为负%H:%M:%S.%f

import datetime

def convert_negative_duration(seconds):
    # 将秒数取绝对值
    abs_seconds = abs(seconds)

    # 将秒数转换为datetime.timedelta对象
    duration = datetime.timedelta(seconds=abs_seconds)

    # 获取秒数的绝对值
    abs_seconds = duration.total_seconds()

    # 计算小时数、分钟数、秒数和微秒数
    hours = int(abs_seconds / 3600)
    minutes = int((abs_seconds % 3600) / 60)
    seconds = int(abs_seconds % 60)
    microseconds = int((abs_seconds % 1) * 1000000)

    # 格式化为负%H:%M:%S.%f的字符串表示
    formatted_duration = "-{:02d}:{:02d}:{:02d}.{:06d}".format(hours, minutes, seconds, microseconds)

    return formatted_duration

# 测试
duration_in_seconds = -1234.5678
formatted_duration = convert_negative_duration(duration_in_seconds)
print(formatted_duration)