我在运行 numpy.frombuffer 的 python 代码时收到错误，需要类似字节的对象，而不是“NoneType”；

Question

此代码在 Windows（python 版本 = 3.10.3）中运行良好，但是当我在 Linux（python 版本 = 3.9.7）中运行它时，它会抛出以下错误消息：

import numpy as np

sound_buffer = np.frombuffer(in_data, dtype=np.float32)

TypeError: a bytes-like object is required, not 'NoneType'

这是代码片段：

## Callback Thread ##

def callback(in_data, frame_count, time_info, status):
    global sound_data
    sound_buffer = np.frombuffer(in_data,np.uint8, dtype="float32")
    sound_data = np.append(sound_data, sound_buffer)
    if len(sound_data) >= 88200:
        audio_analysis_queue.put(sound_data)
        current_time = time.ctime(time.time())
        audio_analysis_queue.put(current_time)
        sound_data = np.zeros(0, dtype="float32")
    return sound_buffer, pyaudio.paContinue


pa = pyaudio.PyAudio()

stream = pa.open(format=AUDIO_FORMAT,
                 rate=AUDIO_RATE,
                 channels=NUMBER_OF_AUDIO_CHANNELS,
                 input_device_index=AUDIO_DEVICE_INDEX,
                 frames_per_buffer=NUMBER_OF_FRAMES_PER_BUFFER,
                 output=True,
                 stream_callback=callback)

# Starts the callback thread
stream.start_stream()

print("--- Listening to Audio Stream ---")