如何通过python中运行的程序手动停止python中的语音识别？

import speech_recognition as sr

r = sr.Recognizer()

with sr.Microphone() as source:
    audio = r.listen(source)

r.stop()

import speech_recognition as sr

r = sr.Recognizer()

with sr.Microphone() as source:
    audio = r.listen(source)
    r.stop()

try:
    text = r.recognize_google(audio)
    print("识别结果：" + text)
except sr.UnknownValueError:
    print("无法识别音频")
except sr.RequestError as e:
    print("请求错误：" + str(e))