FAQ: Retrieval-Based Chatbots - Lesson Review

Frequently Asked Questions Build Chatbots with Python FAQ
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This community-built FAQ covers the “Lesson Review” exercise from the lesson “Retrieval-Based Chatbots”.

Paths and Courses
This exercise can be found in the following Codecademy content:

Build Chatbots with Python

FAQs on the exercise Lesson Review

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My chatbot won’t understand my how_to_pay_bill or pay_bill inputs. It just keeps saying it doesn’t understand. Not sure why.

class SupportBot:
negative_responses = (“nothing”, “don’t”, “stop”, “sorry”)

exit_commands = (“quit”, “pause”, “exit”, “goodbye”, “bye”, “later”)

def init(self):
self.matching_phrases = {‘how_to_pay_bill’: [r’.*how.pay bills.’, r’.*how.pay my bill.’], r’pay_bill’: [r’.*want.*pay.*my.*bill.*account.*number.*is (\d+)’, r’.*need.*pay.*my.*bill.*account.*number.*is (\d+)’]}

def welcome(self):
name = input("Hi, I’m a customer support representative. Welcome to Codecademy Bank. Before we can help you, I need some information from you. What is your first name and last name? ")

will_help = input(f"Ok {name}, what can I help you with? ")

if will_help in self.negative_responses:
  print("Ok, have a great day!")
  return

self.handle_conversation(will_help)

def handle_conversation(self, reply):
while not self.make_exit(reply):
reply = self.match_reply(reply)

def make_exit(self, reply):
for exit_command in self.exit_commands:
if exit_command in reply:
print(“Ok, have a great day!”)
return True

return False

def match_reply(self, reply):
for key, values in self.matching_phrases.items():
for regex_pattern in values:
found_match = re.match(regex_pattern, reply)
if found_match and key == ‘how_to_pay_bill’:
return self.how_to_pay_bill_intent()
elif found_match and key == ‘pay_bill’:
return self.pay_bill_intent(found_match.groups()[0])

return input("I did not understand you. Can you please ask your question again?")

def how_to_pay_bill_intent(self):
return input(“You can pay your bill a couple of ways. 1) online at bill.codecademybank.com or 2) you can pay your bill right now with me. Can I help you with anything else?”)

def pay_bill_intent(self, account_number=None):
return input(f"The account with number {account_number} was paid off. What else can I help you with?")

Create a SupportBot instance

SupportConversation = SupportBot()

Call the .welcome() method

SupportConversation.welcome()