I am having some problems with my final code:

  1. The code should continuously return questions selected by random from the tuple (random_questions), instead it usually returns None after asking one random question. But why is that?
  2. My match_reply isn’t working as expected, three of the responses won’t respond.
    I would appreciate any help provided, thanks
# importing regex and random libraries
import re
import random

class AlienBot:
  # potential negative responses
  negative_responses = ("no", "nope", "nah", "naw", "not a chance", "sorry")
  # keywords for exiting the conversation
  exit_commands = ("quit", "pause", "exit", "goodbye", "bye", "later")
  # random starter questions
  random_questions = (
        "Why are you here? ",
        "Are there many humans like you? ",
        "What do you consume for sustenance? ",
        "Is there intelligent life on this planet? ",
        "Does Earth have a leader? ",
        "What planets have you visited? ",
        "What technology do you have on this planet? "

  def __init__(self):
    self.alienbabble = {'describe_planet_intent': r'.*\s*your planet.*',
                        'answer_why_intent': r'why\sare.*',
                        'cubed_intent': r'.*cube.*(\d+)'

  # Define .greet() below:
  def greet(self):
    name = input('What is your name?')
    will_help = input('Hi {}, I\'m Etcetera. I\'m not from this planet. Will you help me learn about your planet?'.format(name))
    if will_help in self.negative_responses:
      print('Ok, have a nice Earth day!')
  # Define .make_exit() here:
  def make_exit(self, reply):
    for exit_command in self.exit_commands:
      if exit_command in reply:
        print('Ok, have a nice Earth day!')
        return True

  # Define .chat() next:
  def chat(self):
    reply = input(random.choice(self.random_questions))
    while not self.make_exit(reply):
      reply = input(self.match_reply(reply))

  # Define .match_reply() below:
  def match_reply(self, reply):
    for key, value in self.alienbabble.items():
      intent = key
      regex_pattern = value
      found_match = re.match(regex_pattern, reply)
      if found_match and intent == 'describe_planet_intent':
        return self.describe_planet_intent()
      elif found_match and intent == 'answer_why_intent':
        return self.answer_why_intent()
      elif found_match and intent == 'cubed_intent':
        return self.cubed_intent(found_match.groups()[0])
        return self.no_match_intent()

  # Define .describe_planet_intent():
  def describe_planet_intent(self):
    responses = ('My planet is a utopia of diverse organisms and species', 'I am from Opidipus, the capital of Wayward Galaxies.')
    return random.choice(responses)

  # Define .answer_why_intent():
  def answer_why_intent(self):
    responses = ('I come in peace', 'I am here to collect data on your planet and its inhabitants.', 'I heard the coffee is good.')
    return random.choice(responses)
  # Define .cubed_intent():
  def cubed_intent(self, number):
    number = int(number)
    cubed_number = number ** 3
    return f'The cube of {number} is {cubed_number}. Isn\'t that cool?'
  # Define .no_match_intent():
  def no_match_intent(self):
    responses = ('Please tell me more.', 'Tell me more!', 'Why do you say that?', 'I see. Can you elaborate?', 'Interesting, Can you tell me more?', 'I see. How do you think?', 'Why?', 'How do you think I feel when you say that?')
    return random.choice(responses)

# Create an instance of AlienBot below:
alien_bot = AlienBot()

Your None return probably comes from the your greet() function that returns, since chat() doesn’t return anything. If you add a return reply to chat that should fix it.

In very general terms, an unexpected return of none can come from functions that aren’t returning something (that’s why I looked for that specific problem and found it very quickly).

For match_reply() that needs a little but of debugging. You should make sure that intent, regex_pattern, and found_match are sensible values (maybe by print statements). Then you can look into the control flow. Or perhaps your for-loop is looping through key-value pairs you’re not expecting. Leave no stone un-turned. It’ll improve your intuition for debugging down the line.

1 Like

Thanks for the tip! I finally got it to work