Python语音识别在按下按钮时listen_in_background？

Question

目前，当用户按下用 py qt 制作的按钮时，我正在尝试让语音识别模块在后台监听。我在类中有初始化和回调方法，但是当我尝试监听麦克风时，它似乎没有注册任何内容，甚至没有输出错误。

class VoiceRecognitionWidget(ScriptedLoadableModuleWidget):
    def callback(self, recognizer, audio):
        try: 
          print(recognizer.recognize_google(audio))
        # handles any api/voice errors  errors 
        except sr.RequestError: 
          print( "There was an issue in handling the request, please try again")
        except sr.UnknownValueError:
          print("Unable to Recognize speech")

    def onApplyButton(self):
        #self.displayLabel.setText("Listening for speech....")

        self.recognizer = sr.Recognizer()
        try: 
          self.microphone = sr.Microphone()

        except(IOError):
          print("ERROR: No default microphone. Check if microphone is plugged in or if you have a default microphone set in your sound settings.")
          self.errors.setText("ERROR: No default microphone. Check if your microphone is plugged in or if you have a default microphone set in your sound settings.")

        with self.microphone as source:
          self.recognizer.adjust_for_ambient_noise(source)
          # audio = self.recognizer.listen(source)

        stop_listening = self.recognizer.listen_in_background(self.microphone, self.callback)

当我按下按钮时，麦克风可以正常收听，只是当我尝试让它连续收听时，它似乎没有做任何事情。我还尝试在初始化整个 GUI(未显示)的同一类中的函数中创建识别器和麦克风，但这也不起作用。任何帮助将不胜感激。

Answer 1

在回调函数中，我放置了 self.recognizer.recognize_google(audio) 而不管 recognizer 参数。当然，该类需要有一个 recognizer = sr.Recognizer()