ashirvp / chatbot

Building a Simple Chatbot from Scratch in Python (using NLTK)

History of chatbots dates back to 1966 when a computer program called ELIZA was invented by Weizenbaum. It imitated the language of a psychotherapist from only 200 lines of code. .

On similar lines let's create a very basic chatbot utlising the Python's NLTK library.It's a very simple bot with hardly any cognitive skills,but still a good way to get into NLP and get to know about chatbots.

Pre-requisites

NLTK(Natural Language Toolkit)

Natural Language Processing with Python provides a practical introduction to programming for language processing.

For platform-specific instructions, read here

Installation of NLTK

pip install nltk

Installing required packages

After NLTK has been downloaded, install required packages

import nltk
from nltk.stem import WordNetLemmatizer
nltk.download('popular', quiet=True) # for downloading popular packages
nltk.download('punkt') 
nltk.download('wordnet') 

python chatbot.py