pythonでBinaryとBytesを相互変換

    wavfile = open(config.WAV, 'rb') #read bynary
    print(type(wavfile))
    bwav = wavfile.read() # InmemoryStream to bytes
    print(type(bwav))
    wavfile2 = BytesIO(bwav) # bytes to InmemoryStream
    print(type(wavfile2))