Reynir: A fast, efficient natural language parser for Icelandic
Reynir is a Python 3.x package for parsing Icelandic text into sentence trees (i.e. full constituency parse trees). The trees can then be used to extract information from the text, for instance about people, titles, entities, facts, actions and opinions.
Along the way, Reynir tokenizes the text, finds lemmas and assigns part-of-speech (POS) tags to every word.
Full documentation for Reynir is available here.
Reynir is the engine of Greynir.is, a natural-language front end for a database of 6 million sentences parsed from Icelandic news articles.
Reynir uses the Tokenizer package, by the same authors, to tokenize text.
>>> from reynir import Reynir >>> r = Reynir() >>> sent = r.parse_single("Ása sá sól.") >>> print(sent.tree.view) P # Root +-S-MAIN # Main sentence +-IP # Inflected phrase +-NP-SUBJ # Noun phrase, subject +-no_et_nf_kvk: 'Ása' # Noun, singular, nominative, feminine +-VP # Verb phrase +-so_1_þf_et_p3: 'sá' # Verb, 1 accusative arg, singular, 3rd p +-NP-OBJ # Noun phrase, object +-no_et_þf_kvk: 'sól' # Noun, singular, accusative, feminine +-'.' # Punctuation >>> sent.tree.nouns ['Ása', 'sól'] >>> sent.tree.verbs ['sjá'] >>> sent.tree.flat 'P S-MAIN IP NP-SUBJ no_et_nf_kvk /NP-SUBJ VP so_1_þf_et_p3 NP-OBJ no_et_þf_kvk /NP-OBJ /VP /IP /S-MAIN p /P' >>> # The subject noun phrase (S.IP.NP also works) >>> sent.tree.S.IP.NP_SUBJ.lemmas ['Ása'] >>> # The verb phrase >>> sent.tree.S.IP.VP.lemmas ['sjá', 'sól'] >>> # The object within the verb phrase (S.IP.VP.NP also works) >>> sent.tree.S.IP.VP.NP_OBJ.lemmas ['sól']
This package runs on CPython 3.4 or newer, and on PyPy 3.5 or newer.
If a binary wheel package isn't available on PyPi
for your system, you may need to have the
python3-dev and/or potentially
python3.6-dev packages (or their Windows equivalents) installed on your
system to set up Reynir successfully. This is because a source distribution
install requires a C++ compiler and linker:
# Debian or Ubuntu: sudo apt-get install python3-dev sudo apt-get install python3.6-dev
To install this package:
$ pip3 install reynir # or pip install reynir if Python3 is your default
If you want to be able to edit the source, do like so (assuming you have git installed):
$ git clone https://github.com/vthorsteinsson/ReynirPackage $ cd ReynirPackage $ # [ Activate your virtualenv here if you have one ] $ python setup.py develop
The package source code is now in
To run the built-in tests, install pytest,
cd to your
ReynirPackage subdirectory (and optionally activate your
virtualenv), then run:
$ python -m pytest