Hello, Chatbot! Learn to Build Your First Virtual Assistant with Python

In this tutorial, we will guide you to create a Python chatbot. We will use the Natural Language Processing library (NLTK) to process user input and the ChatterBot library to create the chatbot. 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. This free course on how to build a chatbot using Python will help you comprehend it from scratch. You will first start by understanding the history and origin of chatbot and comprehend the importance of implementing it using Python programming language.

Use Flask to create a web interface for your chatbot, allowing users to interact with it through a browser. Use the ChatterBotCorpusTrainer to train your chatbot using an English language corpus. Import ChatterBot and its corpus trainer to set up and train the chatbot. Install the ChatterBot library using pip to get started on your chatbot journey. For instance, Python’s NLTK library helps with everything from splitting sentences and words to recognizing parts of speech (POS). On the other hand, SpaCy excels in tasks that require deep learning, like understanding sentence context and parsing.

Building Chatbot using NLTK

The self-learning approach of chatbots can be divided into two types. In today’s world, we have libraries that specialize in understanding human language. Python’s NLTK library provides the necessary means to connect with machines and make them understand the intent of humans and reply accordingly. Panel is a basic library that allows us to display fields in the notebook and interact with the user.

I’ve carefully divided the project into sections to ensure that you can easily select the phase that is important to you in case you do not wish to code the full application. This is why complex large applications require a multifunctional development team collaborating to build the app. As ChatBot was imported in line 3, a ChatBot instance was created in line 5, with the only required argument being giving it a name. As you notice, in line 8, a ‘while’ loop was created which will continue looping unless one of the exit conditions from line 7 are met.

Full Chatbot Program Code

Next open up a new terminal, cd into the worker folder, and create and activate a new Python virtual environment similar to what we did in part 1. Ultimately, we want to avoid tying up the web server resources by using Redis to broker the communication between our chat API and the third-party API. Ideally, we could have this worker running on a completely different server, in its own environment, but for now, we will create its own Python environment on our local machine. Redis Enterprise Cloud is a fully managed cloud service provided by Redis that helps us deploy Redis clusters at an infinite scale without worrying about infrastructure. The get_token function receives a WebSocket and token, then checks if the token is None or null. In the websocket_endpoint function, which takes a WebSocket, we add the new websocket to the connection manager and run a while True loop, to ensure that the socket stays open.

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