树莓派2使用speech_recognition遇recognize_google属性及导入错误求助

初始代码与报错 #

运行以下代码调用Google语音识别：

import speech_recognition as sr
r = sr.Recognizer()
with sr.Microphone() as source:
    string = ""
    audio = r.listen(source)
    string = r.recognize_google(audio)
print(string)

触发错误：

AttributeError: 'Recognizer' object has no attribute 'recognize_google'

尝试修复后的新报错 #

添加指定导入代码后：

from speech_recognition.recognizers import google, whisper

出现新错误：

ImportError: cannot import name 'NotRequired' from 'typing_extentions'

已确认typing_extentions库已安装，但无法定位错误原因及解决办法。

内容的提问来源于stack exchange，提问作者Justin