What to Know to Build an AI Chatbot with NLP in Python

NLP Chatbot Python

The bot created using this library will get trained automatically with the response it gets from the user. In recent years, Chatbots have become increasingly popular for automating simple conversations between users and software-platforms. Chatbots are capable of responding to user input and can understand natural language input. Python-NLTK (Natural Language ToolKit) is a powerful library that can be used to perform Natural Language Processing (NLP) tasks. In this tutorial, we will be creating a simple hardcoded chatbot using Python-NLTK. In human speech, there are various errors, differences, and unique intonations.

NLP Chatbot Python

Natural language processing (NLP) is one of the most promising fields of artificial intelligence that uses natural languages to enable human interactions with machines. In this step, you will install the spaCy library that will help your chatbot understand the user’s sentences. Pandas — A software library is written for the Python programming language for data manipulation and analysis.

Step 3: Create and Train the Chatbot

This guide will walk you through a simple method to build a Python chatbot. It supports text-based and web-based interfaces and offers multilingual capabilities, making it suitable for global projects. The library utilizes NLP techniques like tokenization, stemming, and lemmatization to enhance understanding and response accuracy. Additionally, it integrates with pre-trained language models like spaCy to further improve its language processing capabilities. The Generative Pre-trained Transformer (GPT) architecture is at the core of these chatbots.

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You’ll write a chatbot() function that compares the user’s statement with a statement that represents checking the weather in a city. To make this comparison, you will use the spaCy similarity() method. This method computes the semantic similarity of two statements, that is, how similar they are in meaning. This will help you determine if the user is trying to check the weather or not. And the more they interact with the users, the better and more efficient they get.

Approaches for Chatbot Development

They cannot generate their own answers but with an extensive database of answers and smartly designed rules, they can be very productive and useful. In this article, we show how to develop a simple rule-based chatbot using cosine similarity. In the next article, we explore some other natural language processing arenas. Once the response is generated, the user input is removed from the collection of sentences since we do not want the user input to be part of the corpus. You can see why this type of chatbot is called a rule-based chatbot. There are plenty of rules to follow and if we want to add more functionalities to the chatbot, we will have to add more rules.

Platform allows to copy other developers’ Stories together with their training. For example, an NLP engine knows that phrases like “can you”, “how can I”, “could you help me” are general. NLP engines tend to ignore these “senseless” parts when they extract the meaning. This is a popular solution for vendors that do not require complex and sophisticated technical solutions. Self-supervised learning (SSL) is a prominent part of deep learning…

Python Chatbot FAQs

Sumit likes a part of technical meetups, conferences and workshops. His love for building applications and problem solving has won him multiple awards and accolades. He is regularly invited speak at premier educational institutes of India.

We use the RegEx Search function to search the user input for keywords stored in the value field of the keywords_dict dictionary. If you recall, the values in the keywords_dict dictionary were formatted with special sequences of meta-characters. RegEx’s search function uses those sequences to compare the patterns of characters in the keywords with patterns of characters in the input string. In the script above, we first set the flag continue_dialogue to true. After that, we print a welcome message to the user asking for any input.


In contrast, AI-powered chatbots use machine learning algorithms to analyze and understand a user’s input while continuously learning from interactions and improving responses over time. NLP is a tool for computers to analyze, comprehend, and derive meaning from natural language in an intelligent and useful way. This goes way beyond the most recently developed chatbots and smart virtual assistants. In fact, natural language processing algorithms are everywhere from search, online translation, spam filters and spell checking.

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