Skip to content


Switch branches/tags


Failed to load latest commit information.
Latest commit message
Commit time

pke - python keyphrase extraction

pke is an open source python-based keyphrase extraction toolkit. It provides an end-to-end keyphrase extraction pipeline in which each component can be easily modified or extended to develop new models. pke also allows for easy benchmarking of state-of-the-art keyphrase extraction models, and ships with supervised models trained on the SemEval-2010 dataset.

python-package workflow

Table of Contents


To pip install pke from github:

pip install git+

pke relies on spacy (>= 3.2.3) for text processing and requires models to be installed:

# download the english model
python -m spacy download en_core_web_sm

Minimal example

pke provides a standardized API for extracting keyphrases from a document. Start by typing the 5 lines below. For using another model, simply replace pke.unsupervised.TopicRank with another model (list of implemented models).

import pke

# initialize keyphrase extraction model, here TopicRank
extractor = pke.unsupervised.TopicRank()

# load the content of the document, here document is expected to be a simple 
# test string and preprocessing is carried out using spacy
extractor.load_document(input='text', language='en')

# keyphrase candidate selection, in the case of TopicRank: sequences of nouns
# and adjectives (i.e. `(Noun|Adj)*`)

# candidate weighting, in the case of TopicRank: using a random walk algorithm

# N-best selection, keyphrases contains the 10 highest scored candidates as
# (keyphrase, score) tuples
keyphrases = extractor.get_n_best(n=10)

A detailed example is provided in the examples/ directory.

Getting started

To get your hands dirty with pke, we invite you to try our tutorials out.

Name Link
Getting started with pke and keyphrase extraction Open In Colab
Model parameterization Open In Colab
Benchmarking models Open In Colab

Implemented models

pke currently implements the following keyphrase extraction models:

Model performances

For comparison purposes, overall results of implemented models on commonly-used benchmark datasets are available in results. Code for reproducing these experiments are in the benchmarking notebook (also available on Open In Colab).

Citing pke

If you use pke, please cite the following paper:

  author    = {Boudin, Florian},
  title     = {pke: an open source python-based keyphrase extraction toolkit},
  booktitle = {Proceedings of COLING 2016, the 26th International Conference on Computational Linguistics: System Demonstrations},
  month     = {December},
  year      = {2016},
  address   = {Osaka, Japan},
  pages     = {69--73},
  url       = {}