帮我写一个 python代码，音频去人声，留下伴奏，针对MP3的

好的，以下是python代码：

import os
from pydub import AudioSegment

# Step 1: Load Audio File
audio_file = AudioSegment.from_file("input_file.mp3", format="mp3")

# Step 2: Split Audio into Channels (Stereo audio only)
left_channel = audio_file.split_to_mono()[0]
right_channel = audio_file.split_to_mono()[1]

# Step 3: Invert Phase of Left Channel
inverted_left_channel = left_channel.invert_phase()

# Step 4: Combine Inverted Left Channel with Right Channel
accompaniment_only = inverted_left_channel.overlay(right_channel)

# Step 5: Export Accompaniment Only Audio File
accompaniment_only.export("output_file.mp3", format="mp3")

这个代码将会读取 "input_file.mp3" 音频文件，然后将人声去除，在 "output_file.mp3" 中输出伴奏。