Record audio using PyAudio in real-time

recordaudio_realtime.py

self.FORMAT = pyaudio.paInt16
self.CHANNELS = 1
self.RATE = 44100
self.CHUNK = 1024
self.WAVE_OUTPUT_FILENAME = "file.wav"
self.RECORD_SECONDS = 20

def record(self):
        self.audio = pyaudio.PyAudio()
        # start Recording
        self.stream = self.audio.open(format=self.FORMAT, channels=self.CHANNELS,
                                      rate=self.RATE, input=True, frames_per_buffer=self.CHUNK)
        print("recording...")
        self.frames = []
        for i in range(0, int(self.RATE / self.CHUNK * self.RECORD_SECONDS)):
            self.data = self.stream.read(self.CHUNK)
            self.frames.append(self.data)
        # stop Recording
        self.stream.stop_stream()
        self.stream.close()
        self.audio.terminate()

        self.waveFile = wave.open(self.WAVE_OUTPUT_FILENAME, 'wb')
        self.waveFile.setnchannels(self.CHANNELS)
        self.waveFile.setsampwidth(self.audio.get_sample_size(self.FORMAT))
        self.waveFile.setframerate(self.RATE)
        self.waveFile.writeframes(b''.join(self.frames))
        self.waveFile.close()