Question

这似乎与我之前提出的问题类似。但是，我对代码做了很多修改，这改变了我所遇到的问题。为了提供上下文，我在烧瓶上构建了一个whatsapp Twilio聊天机器人。这个想法是，如果用户输入某个关键字，他们将根据输入的内容收到一条消息。

除此之外，我还创建了一个函数来尝试限制一个人在24小时内可以发出/接收的请求/响应的数量。因此，用户从其第一次操作开始的24小时内只能使用该聊天机器人5次。

这是我为此聊天机器人编写的代码，我添加了注释以解释逻辑，因此更容易发现我犯的任何错误并包括我正在使用的所有库：

from flask import Flask, request
from twilio.twiml.messaging_response import MessagingResponse
from datetime import datetime
import pytz
import re

app = Flask(__name__)

@app.route('/bot', methods=['POST'])
def bot():
    incoming_msg = request.values.get('Body', '').lower()
    resp = MessagingResponse()
    #extract phone number from ngrok
    number = request.values.get('From', '')
    #remove non numerical values
    cleaned_number = re.sub('[^0-9]', '', number)
    msg = resp.message()
    responded = False
    # this will store information about user session such as the time of user's first request and request counter
    sessionStorage = {}
    # addng user to session storage with current time and sett ing request counter to 0
    def add_user(user,time,counter):
        sessionStorage[user] = {}
        # time when first session starts
        sessionStorage[user][time] = datetime.now(pytz.timezone('Africa/Harare'))
        sessionStorage[user][counter] = 0
    # checking if user can perform a request and updating time if required
    def request_check(user,time,counter):
        difference = sessionStorage[user][time] - datetime.now(pytz.timezone('Africa/Harare'))
        # check if it has been 24 hours after first request, if so then reset request counter and set last request time to current time
        sessionStorage[user][counter] = 0
        sessionStorage[user][time] = datetime.now(pytz.timezone('Africa/Harare'))
        # if user requests exceed 5 then do not allow any more requests
        if sessionStorage[user][counter] > 5:
            return False
        # in other cases allow user to continue requesting
        return True
    # function to increment request counter for current user
    def increment_request_counter(user, counter):
        sessionStorage[user][counter] += 1

    if request_check(user=cleaned_number, time=datetime.now(pytz.timezone('Africa/Harare')), counter=0):
        if incoming_msg == 'help':
            output = 'This is a chatbot designed to send XYZ.'
            msg.body(output)
        responded = True
        # returns sender's number
        if 'test' in incoming_msg:
            msg.body(cleaned_number)
            responded = True
        if 'first' in incoming_msg:
            text = 'First test text'
            msg.body(text)
            responded = True
        if 'second' in incoming_msg:
            text = 'Second test text'
            msg.body(text)
            responded = True
        if not responded:
            msg.body('Not programmed to return this text')
        return str(resp)
        increment_request_counter(user=cleaned_number)

if __name__ == '__main__':
    app.run(debug=True)

当我尝试输入关键字时。例如whatsapp上的“ first”，我在Pycharm终端中收到以下错误消息：

  File "C:\Users\User\Documents\GitHub\gradientboostwhatsapp\venv\lib\site-packages\flask\app.py", line 1935, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "C:\Users\User\Documents\GitHub\gradientboostwhatsapp\bot.py", line 46, in bot
    if request_check(user=cleaned_number, time=datetime.now(pytz.timezone('Africa/Harare')), counter=0):
  File "C:\Users\User\Documents\GitHub\gradientboostwhatsapp\bot.py", line 33, in request_check
    difference = sessionStorage[user][time] - datetime.now(pytz.timezone('Africa/Harare'))
KeyError: '27652581300'

烧瓶Twilio chatbot中的KeyError

0 个答案: