同时找到我的问题的答案，回调看起来像这样：
def callback(in_data, frame_count, time_info, flag): global b,a,fulldata #global variables for filter coefficients and array audio_data = np.fromstring(in_data, dtype=np.float32) #do whatever with data, in my case I want to hear my data filtered in realtime audio_data = signal.filtfilt(b,a,audio_data,padlen=200).astype(np.float32).tostring() fulldata = np.append(fulldata,audio_data) #saves filtered data in an array return (audio_data, pyaudio.paContinue)
