小助手，while循环和脚本时长问题Python 3.9

如何解决小助手，while循环和脚本时长问题Python 3.9

你好 stachoverflow 社区，我刚刚开始编程，我的第一个项目是一个小的虚拟助手。我从 yt 视频中获得了一些灵感和支持。无论如何，出现了一些问题：当我在 Pycharm 中启动程序并且没有给出命令（我对 alexa 这个词什么也没说）时，程序在 arounf 12 秒后崩溃。我认为这与循环有关，因为我尝试用语音命令打破循环，我的下一个问题是什么。我尝试了一些事情来用语音命令结束循环内的循环，但它不起作用。这甚至可能吗？你们有其他解决方案吗？这是错误：回溯（最近一次调用最后一次）：文件“C:\Users”，第 54 行，在 run_alexa() 文件“C:\Users”，第 28 行，在 run_alexa 中命令 = take_command() 文件“C:\Users”，第 26 行，在 take_command 中返回命令 UnboundLocalError：赋值前引用了局部变量“command”

先谢谢你！阿德里安（我的代码）我希望你能帮助我！ [https://i.stack.imgur.com/m8Neo.png][1] [https://i.stack.imgur.com/qNTdG.png][2]

import speech_recognition as sr
import pyttsx3
import pywhatkit
import datetime
import wikipedia
import pyjokes

listener = sr.Recognizer()
engine = pyttsx3.init()
voices = engine.getProperty("voices")
engine.setProperty("voice",voices[1].id)


def talk(text):
    engine.say(text)
    engine.runAndWait()


def take_command():
    try:
        with sr.Microphone() as source:
            print("listening...")
            voice = listener.listen(source)
            command = listener.recognize_google(voice)
            command = command.lower()
            if "alexa" in command:
                command = command.replace("alexa","")
                # print(command)
    except:
        pass
    return command


def run_alexa():
    command = take_command()
    print(command)
    if "play" in command:
        song = command.replace("play","")
        talk("playing" + song)
        pywhatkit.playonyt(song)
    elif "time" in command:
        time = datetime.datetime.Now().strftime("%H:%M")
        talk("The current time is " + time)
        print(time)
    elif "who is" in command:
        person = command.replace("who is","")
        info = wikipedia.summary(person,1)  # how many lines do I want in the summary
        print(info)
        talk(info)
    elif "tell me a joke" in command:
        talk(pyjokes.get_joke())
    elif "stock" in command:
        stock_price = pywhatkit.search(command)
        talk(stock_price)
    elif "stop" in command:
        talk("alexa is going down")
    else:
        talk("Please say the command again.")


while True:
    run_alexa()