How to Make a Rule based Chatbot in Python using Flask

How to Make a Rule based Chatbot in Python using Flask

rule based chatbot python

In simple words, Rule based chatbot python project are computer programs that follow a set of predetermined rules to reply to users. These programs are designed to simulate a conversation with a human being. They can be programmed by anyone who has the knowledge of programming languages such as Python, Java, and all other programming languages. When we are hired for e-commerce chatbot development services, we receive the training data from our customers. To teach the chatbot, customers provide us with PDFs, spreadsheets and website FAQs.

While there is also an increased chance of miscommunication with chatbots, AI chatbots with machine learning technology can tackle complex questions. They can also be used in games to provide hints or walkthroughs. Rule-based chatbots are structured as a dialog tree and often use regular expressions to match a user’s input to human-like responses.

Let’s understand what’s happening under the hood

We then went ahead to discuss an important concept of Natural Language Understanding, which includes intents and entities. We then discussed the rule based approach with the use of regular expression; this is a tedious approach, and managing rules here could be complex. Machine Learning along with the word vectors to perform intent classification would be a good approach (you can try nearest neighbour/cosine approach for simplicity). One of the main advantages of learning-based chatbots is their flexibility to answer a variety of user queries. Though the response might not always be correct, learning-based chatbots are capable to answer to any type of user query. One of the major drawbacks of these chatbots is that they may need a huge amount of time and data to train.

What is the difference between rule-based chatbot and AI chatbot?

The biggest difference between AI chatbots and rule-based chatbots is the usage of machine learning models that significantly increase the bot's functionality as it can identify hundreds of different questions written by a human, leading to more insightful and dynamic thinking.

The platform includes a basic plan (from $9 per month) and a pro plan with more advanced features (from $209 per month). Chatfuel will be your perfect choice if you plan to communicate with customers via Facebook Messenger or Telegram. For reference, I am following the Build Chatbots with Python path on Codecademy. Now, the word_f lists is a purer version of the list with no repetition of words.

Python Programming – Learn Python Programming From Scratch

An e-commerce website spends a lot of money managing customer data for tracking potential clients. Nobody likes to be alone always, but sometimes loneliness could be a better medicine to hunch the thirst for a peaceful environment. Even during such lonely quarantines, we may ignore humans but not humanoids. Yes, if you have guessed this article for a chatbot, then you have cracked it right. We won’t require 6000 lines of code to create a chatbot but just a six-letter word “Python” is enough.

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But before we begin actual coding, let’s first briefly discuss what chatbots are and how they are used. If you decided to adopt chatbots for your online store, you also need to be aware of chatbot building platforms. We have compiled a list of three popular platforms, used by our developers for building e-commerce chatbots. The conversation interface of your future chatbot should also include options like “Yes,” “No,” and others to help the dialog process. Also, a good conversational UI should manage user expectations and imply the validation of user input data.

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Before we start, I just want you to know a few things about, what are we looking at. We will not be looking at a super-smart chatbot like Siri because it will need a huge experience and expertise. Now, if we think, it will be pretty cool, if our chatbot can help us book a hotel, play a song for us, tell us about the weather reports, and so on. We will try to implement all these facilities in our chatbot using just some basic python web handling libraries.

rule based chatbot python

At this stage, the e-commerce team maps entities to specific objects that already exist on your e-commerce systems, such as Products, Catalog, Contacts, and others. The development team also implements some business logic validation rules on top of the data extracted. The backend of the chatbot allows handling messages received from several channels and processing them with NLP (natural language processing).

How to deploy a chatbot on Flask

Rule-based chatbots have branching questions that help visitors choose the correct option. The tree-like flow of conversation allows customers to select an option that will resolve their question or issue. Natural language processing plays a significant role in building rule-based chatbots. NLP technology is beneficial for the bots to understand customer requests and break down the complexity of human language.

  • Moreover, all the user groups should use a chatbot without a need to learn anything.
  • Once the developer has established the selected channels, the next step is to determine some of the UI elements.
  • AI-based Chatbots are a much more practical solution for real-world scenarios.
  • Convert a sentence [i.e., a collection of words] into single words.
  • These encoded vectors are obtained from all the input statements in our batch.
  • Rule-based chatbots are pretty straight forward as compared to learning-based chatbots.

If the query is simple like product fault, booking mistake, or needing some information, then a chatbot can resolve the query without any human intervention. In case of a more complex problem, a chatbot passes on the details to the human head and helps users to connect with the organization manager easily. In this webinar, you will learn how to build one such chatbot. The above execution of the program tells us that we have successfully created a chatbot in Python using the chatterbot library. However, it is also necessary to understand that the chatbot using Python might not know how to answer all the queries.

Identifying opportunities for an Artificial Intelligence chatbot

It uses a number of machine learning algorithms to produce a variety of responses. It becomes easier for the users to make chatbots using the ChatterBot library with more accurate responses. If you have decided to develop a DIY Chabot, you can use one of chatbot development tools. As a result, you can receive a simple rule-based chatbot that will answer basic questions and perform simple tasks. Such chatbots can recognize several phrases and provide customers with pre-programmed answers. In this article, we started by highlighting the importance of chatbot, and the two approaches to create conversational agent namely Rule based and Self Learning.

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Since you have decided to revolutionize the customer experience that your online shop offers, welcome to this part of the article. To run the chatbot, we have two main files; and After predicting the class, we’ll get a random response from the list of intents. But the thing covered till far will be more than enough to get started. Many of these normalization features allow you to give greater meaning to some parts of the text and eliminate the ‘filler words’.

thoughts on “Basics of building an Artificial Intelligence Chatbot – 2023”

We will not understand HTML and jquery code as jquery is a vast topic. We have already installed the flask in the system, so we will import the python methods we require to run the flask microserver. The Flask is a Python micro-framework used to create small web applications and websites using python.

  • If you are confused between ‘Machine Learning vs Rule-based’, you should first understand what is AI and bots!
  • RegEx’s search function uses those sequences to compare the patterns of characters in the keywords with patterns of characters in the input string.
  • If you guys are using Google Colaboratory notebook, you need to use the below command to install it on Google Colab.
  • Then it generates a pickle file in order to store the objects of Python that are utilized to predict the responses of the bot.
  • In a business environment, a chatbot could be required to have a lot more intent depending on the tasks it is supposed to undertake.
  • But due to Youtube’s constantly changing its source codes this sometimes generates errors.

I found this combined approach much effective than a fully self-learned approach. In the past few years, chatbots in the Python programming language have become enthusiastically admired in the sectors of technology and business. These intelligent bots are so adept at imitating natural human languages and chatting with humans that companies across different industrial sectors are accepting them. From e-commerce industries to healthcare institutions, everyone appears to be leveraging this nifty utility to drive business advantages.


You’ve successfully built a rule-based chatbot using Python and NLTK. While our chatbot is relatively simple, it provides a solid foundation for more advanced projects. By exploring other NLP techniques and incorporating more diverse corpora, you can create a truly remarkable AI companion. You can’t directly use or fit the model on a set of training data and say… The process of building a chatbot in Python begins with the installation of the ChatterBot library in the system. For best results, make use of the latest Python virtual environment.

rule based chatbot python

Our model and the train(X) and target(Y) sets of our training data are returned by the function. It uses categorical cross-entropy as loss function and activation Softmax on the final layer. As we have known, all the patterns from all_patterns detected under all tags are tokenized.

How do you make a rule-based chatbot in Python?

Building a chatbot. This very simple rule based chatbot will work by searching for specific keywords in inputs given by a user. The keywords will be used to understand what action the user wants to take (user's intent). Once the intent is identified, the bot will then pick out a response appropriate to the intent.

Congratulations, we have successfully built a chatbot using Python and Flask. Flask(__name__) is used to create the Flask class object so that Python code can initialize the Flask server. Now start developing the Flask framework based on the above ChatterBot in the above steps. You guys can refer to ChatterBot’s official documents for more information, or you can see the GitHub code for it. Also, you can see the below flow chart to understand better how ChatterBot works.

rule based chatbot python

There could be multiple paths using which we can interact and evaluate the built voice bot. The following video shows an end-to-end interaction with the designed bot. There could be multiple paths using which we can interact and evaluate the built text bot. The following videos show an end-to-end interaction with the designed bot. It is a process of finding similarities between words with the same root words.

  • Even though it’s not important to pass the Turing Test the first time, it must still be fit for the purpose.
  • Rule-based chatbots cannot jump from one conversation to another, whereas AI chatbots can link one question to another question and answer almost every question.
  • In order to implement the conversation logic, we are writing a separate Python script, so that whenever we need to add or delete some logic it will be easy for us.
  • Over time, as the chatbot indulges in more communications, the precision of reply progresses.
  • ” ever since, we have seen multiple chatbots surpassing their predecessors to be more naturally conversant and technologically advanced.
  • Chatbots have become extremely popular in recent years and their use in the industry has skyrocketed.

What is the disadvantage of rule-based chatbot?

But with advantages come disadvantages. With a rule-based chatbot, the user can only enter what the chatbot is programmed for, and the chatbot is unable to develop itself as it does not learn from previous chats but runs its own race.