ValueError: too many values to unpack while trying to get a callback message from a chatbot

Question

在使用 python 和尝试通过查找 datacamp/others 中的基本函数定义技术来构建聊天机器人方面，我是初学者。但是，当我尝试调用我的函数定义之一时出现此错误。错误在 "response, phrase = match_rule(rules,message)" 上。有人可以帮我解决这个问题吗？

rules ={'I want (.*)': ['What would it mean if you got {0}',
  'Why do you want {0}',
  "What's stopping you from getting {0}"]}

import re
import random
def match_rule(rules, message):
    response, phrase = "default", None


    # Iterate over the rules dictionary
    for pattern, responses in rules.iteritems():
        # Create a match object
        match = re.search(pattern,message)
        if match is not None:
            # Choose a random response
            response = random.choice(responses)
            if '{0}' in response:
                phrase = match.group(1)
    # Return the response and phrase
    return response.format(phrase)

def replace_pronouns(message):

    message = message.lower()
    if 'me' in message:
        # Replace 'me' with 'you'
        return re.sub('me','you',message)
    return message

def respond(message):
    # Call match_rule
    response, phrase = match_rule(rules,message)
    if '{0}' in response:
        # Replace the pronouns in the phrase
        phrase = replace_pronouns(phrase)
        # Include the phrase in the response
        response = response.format(phrase)
    return response

respond("I want a good code")

收到错误：

ValueErrorTraceback (most recent call last)
<ipython-input-27-e6efc4eacb15> in <module>()
----> 1 print(respond("I want a good code"))

<ipython-input-21-4715e10175ce> in respond(message)
      1 def respond(message):
      2     # Call match_rule
----> 3     response, phrase = match_rule(rules,message)
      4     if '{0}' in response:
      5         # Replace the pronouns in the phrase

ValueError: too many values to unpack

Answer 1

欢迎使用 Whosebug。

您的问题在这里：

def respond(message):
    # Call match_rule
    print(f"{match_rule(rules,message)}")
    print("----")
    response, phrase = match_rule(rules,message)  # line with the issue
    if '{0}' in response:
        # Replace the pronouns in the phrase
        phrase = replace_pronouns(phrase)
        # Include the phrase in the response
        response = response.format(phrase)
    return response

如果你调用它，你的 match_rule(rules, message) 的 return 值为：

What's stopping you from getting a good code

它 return 是一个值，但您正试图通过编码解包两个值：

response, phrase = match_rule(rules,message)

要么将 match_rule 的 return 更改为 return 两个值，要么使用变量 response 或 phrase 之一，而不是两者。

ValueError: too many values to unpack while trying to get a callback message from a chatbot

ValueError: too many values to unpack while trying to get a callback message from a chatbot

python

function

valueerror