DeepPavlov is an open-source conversational AI library built on TensorFlow and Keras. It is designed for

• development of production ready chat-bots and complex conversational systems,
• NLP and dialog systems research.

Hello Bot in DeepPavlov

Import key components to build HelloBot.

from deeppavlov.skills.pattern_matching_skill import PatternMatchingSkill
from deeppavlov.agents.default_agent.default_agent import DefaultAgent 
from deeppavlov.agents.processors.highest_confidence_selector import HighestConfidenceSelector

Create skills as pre-defined responses for a user's input containing specific keywords or matching regexps. Every skill returns response and confidence.

hello = PatternMatchingSkill(responses=['Hello world!'], patterns=["hi", "hello", "good day"])
bye = PatternMatchingSkill(['Goodbye world!', 'See you around'], patterns=["bye", "chao", "see you"])
fallback = PatternMatchingSkill(["I don't understand, sorry", 'I can say "Hello world!"'])

Agent executes skills and then takes response from the skill with the highest confidence.

HelloBot = DefaultAgent([hello, bye, fallback], skills_selector=HighestConfidenceSelector())

Give the floor to the HelloBot!

print(HelloBot(['Hello!', 'Boo...', 'Bye.']))

Jupyther notebook with HelloBot example.

Features

Components

Named Entity Recognition | Slot filling

Intent/Sentence Classification | Question Answering over Text (SQuAD)

Sentence Similarity/Ranking | TF-IDF Ranking

Morphological tagging | Automatic Spelling Correction

Skills

Goal(Task)-oriented Bot | Seq2seq Goal-Oriented bot

Open Domain Questions Answering | eCommerce Bot

Frequently Asked Questions Answering | Pattern Matching

Embeddings

ELMo embeddings for the Russian language

FastText embeddings for the Russian language

Auto ML

Tuning Models with Evolutionary Algorithm

Installation

0. Currently we support Linux and Windows platforms and Python 3.6

   • Python 3.5 is not supported!
   • Windows platform requires Visual Studio 2015/2017 with C++ build tools installed!

1. Create a virtual environment with Python 3.6:

   virtualenv env
   

2. Activate the environment:

   • Linux

   source ./env/bin/activate
   

   • Windows

   .\env\Scripts\activate.bat
   

3. Install the package inside this virtual environment:

   pip install deeppavlov
   

Demo

Demo of selected features is available at demo.ipavlov.ai

Quick start

To use our pre-trained models, you should first install their requirements:

python -m deeppavlov install <path_to_config>

Then download the models and data for them:

python -m deeppavlov download <path_to_config>

or you can use additional key -d to automatically download all required models and data with any command like interact, riseapi, etc.

Then you can interact with the models or train them with the following command:

python -m deeppavlov <mode> <path_to_config> [-d]

• <mode> can be train, predict, interact, interactbot, interactmsbot or riseapi
• <path_to_config> should be a path to an NLP pipeline json config (e.g. deeppavlov/configs/ner/slotfill_dstc2.json) or a name without the .json extension of one of the config files provided in this repository (e.g. slotfill_dstc2)

For the interactbot mode you should specify Telegram bot token in -t parameter or in TELEGRAM_TOKEN environment variable. Also if you want to get custom /start and /help Telegram messages for the running model you should:

• Add section to utils/telegram_utils/model_info.json with your custom Telegram messages
• In model config file specify metadata.labels.telegram_utils parameter with name which refers to the added section of utils/telegram_utils/model_info.json

For the interactmsbot mode you should specify Microsoft app id in -i and Microsoft app secret in -s. Also before launch you should specify api deployment settings (host, port) in utils/server_config.json configuration file. Note, that Microsoft Bot Framework requires https endpoint with valid certificate from CA. Here is detailed info on the Microsoft Bot Framework integration

For riseapi mode you should specify api settings (host, port, etc.) in utils/server_config.json configuration file. If provided, values from model_defaults section override values for the same parameters from common_defaults section. Model names in model_defaults section should be similar to the class names of the models main component. Here is detailed info on the DeepPavlov REST API

For predict you can specify path to input file with -f or --input-file parameter, otherwise, data will be taken from stdin.
Every line of input text will be used as a pipeline input parameter, so one example will consist of as many lines, as many input parameters your pipeline expects.
You can also specify batch size with -b or --batch-size parameter.

Documentation

docs.deeppavlov.ai

Tutorials

Jupyter notebooks and videos explaining how to use DeepPalov for different tasks can be found in /examples/tutorials/

License

DeepPavlov is Apache 2.0 - licensed.

Support and collaboration

If you have any questions, bug reports or feature requests, please feel free to post on our Github Issues page. Please tag your issue with bug, feature request, or question. Also we’ll be glad to see your pull requests to add new datasets, models, embeddings, etc.

The Team

DeepPavlov is built and maintained by Neural Networks and Deep Learning Lab at MIPT within iPavlov project (part of National Technology Initiative) and in partnership with Sberbank.