python 合并当前资料夹中所有wav档

import wave
import os
import wave
import numpy as np

filepath="."
wavelist=[]
filenames=os.listdir(filepath)
for filename in filenames:
    name,category=os.path.splitext(filepath+filename)  #分解文件扩展名
    if category=='.wav':  #若文件为wav音频文件
        wavelist.append(filename)
        
        
outfile = "sounds.wav"
output = wave.open(outfile, 'wb')
  
setparm = 0
for infile in wavelist:
    w = wave.open(infile, 'rb')
    if setparm==0:
        output.setparams(w.getparams())   #以第一个wav设定sample rate
        output.writeframes(w.readframes(w.getnframes()))
        setparm = 1
    else:
        output.writeframes(w.readframes(w.getnframes()))
    w.close()

output.close()