How to Use Natural Language Processing in Python to Create an Intelligent Chatbot

The majority of programmers consider Python to be an optimal language for developing intelligent chatbots due to its scalability, accessibility, and “glue language” capabilities. This article will explore natural language processing (NLP) and some of the most commonly used NLP tools, with a focus on constructing an artificially intelligent chatbot with Python.

Explain what a chatbot is.

A chatbot is an Artificial Intelligence (AI) system designed to simulate human conversation and process dialogue. It enables individuals to communicate with computers and other electronic devices in a manner similar to how they would with a human interlocutor. Additionally, the capabilities of chatbots range from answering simple queries to generating predictions based on user data.

When compared to human interaction, why are chatbots so valuable?

Due to their relatively low production costs, businesses are increasingly taking advantage of the development of chatbots. This technology has been found to be highly effective in customer service, resulting in a marked reduction in labour costs.

Businesses have the potential to significantly increase their efficiency by utilising chatbots. These automated systems are capable of providing services to multiple customers simultaneously and can remain available around the clock. Moreover, chatbots are capable of providing each customer with a personalised experience, enabling businesses to create meaningful connections with their customers.

Many businesses are taking advantage of chatbot technology to reach out to their target audience through popular messaging platforms such as WhatsApp and Telegram. This technology enables businesses to provide important information and updates to their customers in an efficient and cost-effective manner.

Various Chatbot Varieties

A few examples of chatbots are:

Artificial intelligence chatbots programmed with natural language

Chatbots that are equipped with a predetermined set of skills are essential for effective communication. It is important to ensure that the questions asked to the chatbot are formulated in the same language that was used to create the chatbot, as this will enable the chatbot to understand and respond to the questions accurately.

Syntactically Intelligent Chatbots

The design of these chatbots necessitates a high level of proficiency in the Artificial Intelligence (AI) field of Natural Language Processing (NLP). By performing text analysis and relevance ranking, these chatbots are able to produce precise reactions to user inputs.

Virtual assistants for customer service

Action-oriented chatbots are widely utilised by service providers, such as airlines and restaurant reservation applications, to pose targeted inquiries to customers and to take the necessary steps in response. These chatbots are becoming increasingly popular in the customer service industry, as they help to streamline the customer experience and reduce the need for manual labour.

Chatbots that can have natural conversations

Chatbots are an exceptional example of technological progress. By responding to both written and vocal commands, they offer users an incredibly versatile experience. A prime example of this is Apple’s virtual assistant, Siri, which can be used to make phone calls, launch applications, or search the web. Through this, Siri demonstrates the full potential of chatbots in making life simpler and more efficient.

Developmental Obstacles of a Chatbot

Despite the increasing popularity of chatbots, the development of those powered by artificial intelligence is still hindered by a variety of challenges. These challenges include, but are not limited to:

  • Misspellings
  • Synonyms
  • Terms reduced to their essential elements
  • Punctuations
  • Homophones
  • Sarcasm
  • Idioms

Taking on these obstacles will improve chatbots’ accuracy and allow them to behave more naturally in conversation.

Chatbots that use natural language processing

In order to create a chatbot that is capable of imitating human conversation, developers have turned to the use of Natural Language Processing (NLP). By utilising NLP, we can address the challenges that are associated with natural language, as we have demonstrated previously. To assist robots in understanding what is being said, NLP breaks the conversation down into sentences and further divides those sentences into words referred to as tokens.

Among the many uses for NLP are:

Analysing public opinion

It is possible to gain insight into emotions such as melancholy, pleasure, and apathy through the practice of Neuro-Linguistic Programming (NLP). Companies can use this technique to understand the sentiment of their customers in relation to their services, thus providing a better customer experience. By taking the time to understand the feelings of their customers, businesses are better equipped to fulfill their customer’s needs and exceed their expectations.

An algorithm for recognising spoken language

This process, which is also known as speech-to-text recognition, facilitates the translation of spoken words into text that can be used and processed by computers. A popular example of this technology is the voice assistant feature on smartphones, which enables users to perform tasks such as online searches and making phone calls with minimal effort.

Synopsis of Source Material

In order to efficiently process large quantities of text, Natural Language Processing (NLP) techniques are frequently employed to analyse and condense the data. The most important and applicable information can be identified by summarising the documents.

Conversion by use of a machine

Natural language processing (NLP) is a powerful tool that enables the rapid translation of text and audio from one language to another. It is an invaluable resource for rapidly scanning large amounts of data, be it simple text or more complicated information, and can help to keep translation costs to a minimum.

Natural language processing (NLP) is a powerful tool that has a wide range of applications. For example, it can be used to improve the accuracy of search engine results pages (SERPs) by matching user queries with relevant website content. NLP is also useful in many other scenarios, such as text summarization, machine translation, question answering, and text classification.

Well-known NLP Software

Here are a few examples of widely used NLP implementation tools:

An Environment for the Study of Language and Its Tools (NLTK)

The Natural Language Processing (NLP) library collection is a free and highly utilised resource for developers. It offers a variety of libraries to facilitate operations such as stemming, lemmatization, tokenization, and stop word removal.


SpaCy is widely regarded as one of the most comprehensive libraries available for natural language processing (NLP). Developed using the Cython programming language, SpaCy enables a range of operations, including tokenization, stemming, removal of stop words and detection of document similarity.

Change-Agent Sentences

Hugging Face’s latest offering is an innovative solution for Natural Language Processing (NLP) tasks, such as identifying similarities between documents. By leveraging an Application Programming Interface (API), pre-trained models can be deployed quickly and with minimal effort from engineers. This not only increases efficiency, but it also reduces the time and energy required to train models from scratch, resulting in a lower carbon footprint and decreased computing costs.

How to use Python to build a conversational AI

What follows are the measures required to construct an AI-driven chatbot.

Bring in the books

Get started by bringing in certain necessary libraries. They consist of the following:

  • Pandas: To construct a data frame.
  • NumPy: A set of modules in Python for manipulating arrays and matrices.
  • JSON: To access and manipulate information in the JavaScript Object Notation (JSON) format, you may use this module.
  • TensorFlow: Necessary for the development of forecasting models.

Generate an intent JSON document.

Creating a comprehensive database of words and their respective classifications based on purpose is essential for the successful development of a chatbot. This database will be used by the chatbot when responding to user queries; when a user submits a question, the chatbot will compare each word in the query to the words in the dictionary to determine the user’s intent. Once the intent is established, an appropriate response will be sent back to the user in the form of a JSON document.

Gathering information before processing it

Preprocessing is a crucial step that occurs before the data is transferred to the model-training phase. There are a few different stages:

  • Stemming: It is important to be cognizant that when letters are removed from a word without considering the inflections, some of the resulting forms may not be legitimate words. Therefore, this process should be applied with caution.
  • Lemmatization: Lemmatization is a process that is similar to stemming in that it reduces words to their simplest forms. The difference between the two is that the result of lemmatization is a proper noun, or lemma. An example of this is the words “moving” and “movement,” which are derived from the base word “move.” This is beneficial for computers because it allows them to more accurately make predictions as the words are easier to comprehend.
  • Dropping of filler words: Stop words, such as articles, prepositions, pronouns, and conjunctions, typically do not contribute to the deeper understanding of a text. As a result, they are often excluded in order to make room for more meaningful content.
  • Tokenization: Tokenization is the act of breaking down a phrase into its constituent parts, typically words, for the machine to interpret with ease. This process involves dividing the phrase into smaller, more manageable components, allowing the machine to recognise and comprehend the phrase with greater accuracy.

Generate a model of a neural network

Tokenized words, which are separate from their original context, are not conducive to direct machine learning. To be able to keep track of the tokens, it is necessary to convert them into numerical representations. To achieve this, two methods are commonly used: bag of words (BoW) and term frequency-inverse document frequency (TF-IDF). BoW and TF-IDF transform tokenized words into a vector format, which enables them to be used in machine learning.


The initial step in the encoding process is tokenization, which involves breaking the phrase into individual words. Subsequently, a vocabulary is constructed by assigning a token to each concept. A sparse matrix is then generated from the data, where each row corresponds to the phrase and the number of columns is equivalent to the size of the vocabulary.


This strategy places a strong emphasis on repetition. As compared to the Bag-of-Words (BoW) approach, TF-IDF (Term Frequency–Inverse Document Frequency) places significantly less importance on articles, prepositions, and conjunctions. This is a great advantage of the TF-IDF approach. It entails two distinct stages: Term Frequency and Inverse Document Frequency.


The neural network model employed in this embedding technique iterates through each word in a phrase, attempting to guess its neighbour. This results in the generation of words with similar meanings to the input word as the output.

Empty phrase bag forever (CBoW)

It’s similar to the skip-gramme technique, except instead of using a predetermined dictionary to guess the next word, a neural network model is used.

It’s no surprise that BoW is a popular choice for embedding words in a sentence. However, different datasets call for different methods.

The model can be trained once the training data has been transformed into a suitable vector format. To train the model, a neural network must be constructed that takes the vectors generated from the training data and the query vector submitted by the user as its inputs. By assessing the query vector against each of the other vectors, it is possible to determine which vector best meets the required goal.

The cosine similarity score is an effective way to compare the query vector with all other vectors. The most significant outcome of this comparison is the highest score achieved in terms of the desired goal.

In order to achieve successful development of AI-assisted chatbots, it is essential to adhere to the four procedures detailed in this article. Thanks to advances in natural language processing (NLP), the development of intelligent chatbots that are capable of replicating human-like conversation is now achievable. Furthermore, these chatbots can improve customer service by offering more personalised responses.

Join the Top 1% of Remote Developers and Designers

Works connects the top 1% of remote developers and designers with the leading brands and startups around the world. We focus on sophisticated, challenging tier-one projects which require highly skilled talent and problem solvers.
seasoned project manager reviewing remote software engineer's progress on software development project, hired from Works blog.join_marketplace.your_wayexperienced remote UI / UX designer working remotely at home while working on UI / UX & product design projects on Works blog.join_marketplace.freelance_jobs