智能语音对话机器人促销

import speech_recognition as sr
from gtts import gTTS
import os

def listen():
    r = sr.Recognizer()
    with sr.Microphone() as source:
        print("Listening...")
        audio = r.listen(source)
    try:
        text = r.recognize_google(audio)
        print(f"User said: {text}")
        return text
    except sr.UnknownValueError:
        print("Sorry, I did not understand that.")
        return None

def speak(text):
    tts = gTTS(text=text, lang='en')
    tts.save("response.mp3")
    os.system("mpg321 response.mp3")

def main():
    while True:
        user_input = listen()
        if user_input:
            if "hello" in user_input.lower():
                speak("Hello! How can I assist you today?")
            elif "bye" in user_input.lower():
                speak("Goodbye! Have a great day!")
                break
            else:
                speak("I'm sorry, I don't know how to respond to that.")

if __name__ == "__main__":
    main()