audio.py 文件源码

def _open_wav(wav):
    '''Internal helper function to open an unknown parameter as a
    wave file.

    wav:
        An open `wave.Wave_read` object, a `bytes` object containing
        a wave file, or a valid argument to `wave.open`.
    '''
    if isinstance(wav, wave.Wave_read):
        yield wav
        return

    if isinstance(wav, bytes) and wav[:4] == b'RIFF':
        w = wave.open(BytesIO(wav), 'rb')
    else:
        w = wave.open(wav, 'rb')
    yield w
    w.close()