如何在python中重复音频wav文件，使其长度至少为6秒

from pydub import AudioSegment

def repeat_audio(input_file, output_file, min_duration):
    audio = AudioSegment.from_wav(input_file)
    duration = len(audio) / 1000  # 获取音频时长（秒）
    
    if duration >= min_duration:
        audio.export(output_file, format='wav')  # 如果音频时长已经达到要求，则直接输出
    else:
        repeat_times = int(min_duration / duration) + 1  # 计算需要重复的次数
        repeated_audio = audio * repeat_times  # 重复音频
        repeated_audio.export(output_file, format='wav')  # 输出重复后的音频

# 示例调用
input_file = 'input.wav'
output_file = 'output.wav'
min_duration = 6  # 最小时长要求为6秒
repeat_audio(input_file, output_file, min_duration)