How to build an intelligent chatbot with Python and Dialogflow

how to build a chatbot in python

This is because Python comes with a very simple syntax as compared to other programming languages. A developer will be able to test the algorithms thoroughly before their implementation. Therefore, a buffer will be there for ensuring that the chatbot is built with all the required features, specifications and expectations before it can go live. Individual consumers and businesses both are increasingly employing chatbots today, making life convenient with their 24/7 availability. Not only this, it also saves time for companies majorly as their customers do not need to engage in lengthy conversations with their service reps. NLTK stands for Natural Language Toolkit and is a leading python library to work with text data.

how to build a chatbot in python

And one good part about writing the whole chatbot from scratch is that we can add our personal touches to it. Finally, in the last line (line 13) a response is called out from the chatbot and passes it the user input collected in line 9 which was assigned as a query. Before becoming a developer of chatbot, there are some diverse range of skills that are needed. First off, a thorough understanding is required of programming platforms and languages for efficient working on Chatbot development. To learn more about text analytics and natural language processing, please refer to the following guides.


In some cases, performing similar actions requires repeating steps, like navigating menus or filling forms each time an action is performed. Chatbots are virtual assistants that help users of a software system access information or perform actions without having to go through long processes. Many of these assistants are conversational, and that provides a more natural way to interact with the system. Building a chatbot with Python is relatively easy and requires only a few lines of code. Please note this is by no means a full tutorial, it’s merely an insight into how to get started. There are many different use cases for chatbots, each requiring their own set of rules, intents, and conversational control.

Chatterbot makes it easier to develop chatbots that can engage in conversations. It starts by creating an untrained chatterbot that has no prior experience or knowledge regarding how to communicate. As the users enter statements, the library saves the request made by the user as well as it also saves the responses that are sent back to the users.

Importing Classes

When you train your chatbot with more data, it’ll get better at responding to user inputs. Next, you’ll learn how you can train such a chatbot and check on the slightly improved results. The more plentiful and high-quality your training data is, the better your chatbot’s responses will be. You can build an industry-specific chatbot by training it with relevant data. Additionally, the chatbot will remember user responses and continue building its internal graph structure to improve the responses that it can give.

how to build a chatbot in python

Together, these technologies create the smart voice assistants and chatbots we use daily. Natural Language Processing or NLP is a prerequisite for our project. NLP allows computers and algorithms to understand human interactions via various languages. In order to process a large amount of natural language data, an AI will definitely need NLP or Natural Language Processing. Currently, we have a number of NLP research ongoing in order to improve the AI chatbots and help them understand the complicated nuances and undertones of human conversations.

In the previous step, you built a chatbot that you could interact with from your command line. The chatbot started from a clean slate and wasn’t very interesting to talk to. The call to .get_response() in the final line of the short script is the only interaction with your chatbot.

  • Our bot will be used for small talk, as well as to answer some math questions.
  • This means that you must download the latest version of Python (python 3) from its Python official website and have it installed in your computer.
  • In the past few years, chatbots in the Python programming language have become enthusiastically admired in the sectors of technology and business.
  • The course includes programming-related assignments and practical activities to help students learn more effectively.

Chatbots are created to accomplish these tasks for users providing them relief from searching for these pieces of information themselves. After setting up the Python process, let’s use flask ngrok to create a public URL for the webhook and listen to port 5000 (in this example). For Kompose webhook, you will need an HTTPS secured server since the local server (localhost) will not work.

This article mainly focuses on the AI framework, Rasa, and a little bit of python. Before getting started, let me tell you the required software to be installed for the project. Finally, you have created a chatbot and there are a lot of features you can add to it. Now comes the final and most interesting part of this tutorial. We will compare the user input with the base sentence stored in the variable weather and we will also extract the city name from the sentence given by the user. Paste the code in your IDE and replace your_api_key with the API key generated for your account.

Step 1 – Creating the weather function

As mentioned previously, this chatbot will be very basic and have minimal cognitive abilities. First, I will talk about the generic framework that leads to the construction of a chatbot through NLTK. Later in this article, I will specifically mention the approach I used to develop Mat. Let’s go through the process of implementing a chatbot in Python.

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By the end of this tutorial, you will have a basic understanding of chatbot development and a simple chatbot that can respond to user queries. 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. Since its knowledge and training are still very limited, we have to provide it time and give more training data to train it further. In 1994, Michael Mauldin created his first chatbot named “Julia”, leading to the birth of the term “chatterbot”. According to the Oxford Dictionary, a chatbot is defined as a computer program that simulates conversation with human users, primarily over the internet.

After creating your cleaning module, you can now head back over to and integrate the code into your pipeline. Running these commands in your terminal application installs ChatterBot and its dependencies into a new Python virtual environment. You should be able to run the project on Ubuntu Linux with a variety of Python versions. However, if you bump into any issues, then you can try to install Python 3.7.9, for example using pyenv. You need to use a Python version below 3.8 to successfully work with the recommended version of ChatterBot in this tutorial.

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It is an AI-based software with the help of NLP to resolve people’s queries without any human interference. Chatbots provide faster solutions than humans, adding another feather to its cap. The most popular applications for chatbots are online customer support and service. They can be used to respond to straightforward inquiries like product recommendations or intricate inquiries like resolving a technical problem. In sales and marketing, chatbots are being used more and more for activities like lead generation and qualification. Learning how to create chatbots will be beneficial since they can automate customer support or informational delivery tasks.

Data Science Deals

Make your chatbot more specific by training it with a list of your custom responses. To restart the AI chatbot server, simply copy the path of the file again and run the below command again (similar to step #6). Keep in mind, the local URL will be the same, but the public URL will change after every server restart. The guide is meant for general users, and the instructions are clearly explained with examples. So even if you have a cursory knowledge of computers, you can easily create your own AI chatbot.

The chatbot is created using the ChatBot class from the chatterbot library. Building a chatbot using Python code can be a simple process, as long as you have the right tools and knowledge. In this article, I’ve provided you with a basic guide to get started. Once you have your chatbot up and running, it’ll be able to handle simple tasks and conversations.

how to build a chatbot in python

A chatbot is a computer program that interacts with humans or simulates a human conversation with a machine via a written message or voice. It is programmed to work independently without the intervention of human operators. It responds to question based on what it knows at that point of time. Based on the above approach chatbots there are two variants of chatbots. It has the ability to seamlessly integrate with other computer technologies such as machine learning and natural language processing, making it a popular choice for creating AI chatbots.

Moreover, from the last statement, we can observe that the ChatterBot library provides this functionality in multiple languages. Thus, we can also specify a subset of a corpus in a language we would prefer. In the above snippet of code, we have imported the ChatterBotCorpusTrainer class from the chatterbot.trainers module. We created an instance of the class for the chatbot and set the training language to English.

Having set up Python following the Prerequisites, you’ll have a virtual environment. Tutorials Point is a leading Ed Tech company striving to provide the best learning material on technical and non-technical subjects. There are a few different ways that you can deploy your chatbot.

  • I won’t tell you what it means, but just search up the definition of the term waifu and just cringe.
  • In human speech, there are various errors, differences, and unique intonations.
  • This has been achieved by iterating over each pattern using a nested for loop and tokenizing it using nltk.word_tokenize.
  • When a user inputs a query, or in the case of chatbots with speech-to-text conversion modules, speaks a query, the chatbot replies according to the predefined script within its library.
  • So essentially, we need to be running all of this code for as long as the conversation is taking place.

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