ChatterBot is a machine learning, conversational dialog engine.
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Chatterbot: Machine learning in Python


ChatterBot is a machine-learning based conversational dialog engine build in Python which makes it possible to generate responses based on collections of known conversations. The language independent design of ChatterBot allows it to be trained to speak any language.

Read in English Leia em Português Leer en español

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An example of typical input would be something like this:

user: Good morning! How are you doing?
bot: I am doing very well, thank you for asking.
user: You're welcome.
bot: Do you like hats?

How it works

An untrained instance of ChatterBot starts off with no knowledge of how to communicate. Each time a user enters a statement, the library saves the text that they entered and the text that the statement was in response to. As ChatterBot receives more input the number of responses that it can reply and the accuracy of each response in relation to the input statement increase. The program selects the closest matching response by searching for the closest matching known statement that matches the input, it then returns the most likely response to that statement based on how frequently each response is issued by the people the bot communicates with.


This package can be installed from PyPi by running:

pip install chatterbot

Basic Usage

from chatterbot import ChatBot
from import ChatterBotCorpusTrainer

chatbot = ChatBot("Ron Obvious")

# Train based on the english corpus

# Get a response to an input statement
chatbot.get_response("Hello, how are you today?")

Training data

Chatterbot comes with a data utility module that can be used to train chat bots. At the moment there is three languages, English, Spanish and Portuguese training data in this module. Contributions of additional training data or training data in other languages would be greatly appreciated. Take a look at the data files in the chatterbot/corpus directory if you are interested in contributing.

# Train based on the english corpus

# Train based on english greetings corpus

# Train based on the english conversations corpus

Corpus contributions are welcome! Please make a pull request.


View the documentation for ChatterBot on Read the Docs.


For examples, see the examples directory in this project's repository.

There is also an example Django project using ChatterBot.

Have you created something cool using ChatterBot?

Please add your creation to the list of projects using ChatterBot in the wiki.


ChatterBot's built in tests can be run using nose.


See the nose documentation for more information.


See release notes for changes