python统计wav文件的时长

import wave
import os.path
 
# 音频存放文件夹绝对路径
filedir = '/Users/111/PycharmProjects/TextClassify/wav'
 
list = os.listdir(filedir)
 
time_count = 0
 
for file in list:
    if '.wav' in file:
        wav_path = filedir+'/'+file
        with wave.open(wav_path,'rb') as f:
            f = wave.open(wav_path)
            time_count += f.getparams().nframes/f.getparams().framerate
 
print(time_count/60/60)