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我正在研究类似于 Siri 和 Cortana 的弱 Ai，但我注意到我一直收到“AttributeError：'NoneType' 对象没有属性'lower'”，除了我的代码而不是我的查询，它总是打印出“对不起，我没听懂”。有人知道如何解决这个问题吗？谢谢

错误：

if 'wikipedia' in query.lower():
AttributeError: 'NoneType' object has no attribute 'lower'

代码：

import pyttsx3
import speech_recognition as sr
import datetime
import wikipedia
import webbrowser
import os
import smtplib
import pythoncom

print("Initializing Karren")

MASTER = "Bob"

engine = pyttsx3.init('sapi5')
voices = engine.getProperty('voices')
engine.setProperty('voice', voices[1].id)

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


def wishMe():
    hour = int(datetime.datetime.now().hour)

    if hour>=0 and hour <12:
        speak("Good Morning" + MASTER)

    elif hour>=12 and hour<18:
        speak("Good Afternoon" + MASTER)
    else:
        speak("Good Evening" + MASTER)


   # speak("I am Karren. How may I assist you?") # deliberately on not included for now

def takeCommand():
    r = sr.Recognizer()
    with sr.Microphone() as source:
        print("Listening...")
        audio = r.listen(source)

    try :
        print("Recognizing...")
        query = r.recognize_google(audio, Language = 'en-uk')
        print(f"User said: {query}\n")

    except Exception as e:
        print("Sorry i didn't catch that...")
        query = None
    return query 

speak("Initializing Karren...")
wishMe()
query = takeCommand()


if 'wikipedia' in query.lower():
    speak("Searching wikipedia")
    query = query.replace("wikipedia", "")
    results = wikipedia.summary(query, sentences=2)
    speak(results)
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2 回答 2

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发生这种情况是因为takeCommand正在返回None。 None没有lower方法，所以你得到这个错误。

您可以做的一件事是记录有关引发异常的更多信息，该异常takeCommand导致它进入except块，或者只是删除try块以便异常停止程序，然后读取回溯。

于 2020-03-30T20:45:46.773 回答
0 
def takeCommand():
r = sr.Recognizer()
with sr.Microphone() as source:
    print("Listening...")
    audio = r.listen(source)

try :
    print("Recognizing...")
    query = r.recognize_google(audio, Language = 'en-uk')
    print(f"User said: {query}\n")

except Exception as e:
    print("Sorry i didn't catch that...")
    query = "None" # or whatever str
return query

我自己试过了。在 Takecommand() 函数中，其中 query = none，将 none 替换为字符串。原因是当您遇到错误时，Nonetype 没有 lower 属性，query = none 并且由于它不是 str 或其他任何内容，因此 lower() 无法对其进行转换。如上所述，这是解决此错误而不再遇到任何错误的一种方法。测试响应。

否则删除查询 = 无

于 2020-12-30T00:28:29.737 回答