错误:__ init __()缺少1个必需的位置参数:"rec"

问题描述

我是python的新手.我正在尝试做应该检测，收听，记录和写入.wav文件的麦克风文件.但是，它在尝试运行文件时给我一个错误.就是说:

I am new to python. I am trying to do microphone file that ought to detect, listen, record and write the .wav files. However, it is giving me an error while I am trying to run the file. It is saying:

TypeError: __init__() missing 1 required positional argument: 'rec'

而且我对listen()有如下相同的问题.这是我的代码:

And I have the same issue with listen() as below. Here is my code:

class Recorder:
# compute the rms
def rms(frame):
    count = len(frame) / swidth
    format = "%dh" % (count)
    shorts = struct.unpack(format, frame)

    sum_squares = 0.0
    for sample in shorts:
        n = sample * SHORT_NORMALIZE
        sum_squares += n * n
    rms = math.pow(sum_squares / count, 0.5);
    return rms * 1000

# create an interface to portaudio
@staticmethod
def __init__(rec):
    rec.p= pyaudio.PyAudio()
    rec.stream= rec.p.open(format=FORMAT, channels=CHANNELS, rate=RATE,input=True,output=True,frames_per_buffer=chunk)

# record the detected sound
def record(rec):
    print('sound detected, record begin')
    frames = []
    current = time.time()
    end = current + Timeout
    while current <= end:
        data = rec.stream.read(chunk, execption_on_overflow=False)
        if rec.rms(data) >= Threshold:
            end = time.time() + Timeout
        current = time.time()
        frames.append(data)
    rec.write(b''.join(frames))

# write the recorded sound to .wav file
def write(rec, recording):
    files = len(os.listdir(FileNameTmp))
    filename = os.path.join(FileNameTmp,time.strftime('%Y_%m_%d-%H_%H_%M_%S.wav'.format(FORMAT)))
    filename2 = time.strftime('%Y_%m_%d-%H_%H_%M_%S.wav'.format(FORMAT))
    wf = wave.open(filename, 'wb')
    wf.setnchannels(CHANNELS)
    wf.setsampwidth(rec.p.get_sample_size(FORMAT))
    wf.setframerate(RATE)
    wf.writeframes(recording)
    wf.close()
    print('Written to file: {}'.format(filename))
    print('Returning to listening')

# listen to the sound
def listen(rec):
    print('Listening beginning')
    while True:
        input = rec.stream.read(chunk, execption_on_overflow=False)
        rms_val = rec.rms(input)
        if rms_val > Threshold:
            rec.record()
k = Recorder()
k.listen()

推荐答案

您将__init__声明为staticmethod，因此，当您将创建您的类的对象.

You declare your __init__ as staticmethod and so there is no self (or in your case rec) argument passed into your constructor when you create an object of your class.

k = Recorder() <--- will pass a reference, typical named self, into your __init__

请看看

1. 此
2. 或此
3. 与此

1. this
2. or this
3. and this

当您要使用静态构造函数时.

when you want to use a static constructor.

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