pykew: Python library for accessing Kew's data services
Library for easy access to Kew's nomenclatural and taxonomic services. Hides the intricacies of using the HTTP API.
IPNI
Module for searching IPNI data and looking up individual records.
Simple search
import pykew.ipni as ipni
result = ipni.search('Poa annua')Advanced search
import pykew.ipni as ipni
from pykew.ipni_terms import Name
query = { Name.genus: 'Poa', Name.species: 'annua' }
res = ipni.search(query)Available Search Terms
To build complex queries, use the search terms available in ipni_terms. Query term are grouped into
the modules Name, Author, and Publication.
Name
- added
- author
- basionym
- basionym_author
- bibliographic_reference
- citation_type
- collection_number
- collectors
- distribution
- family
- full_name
- genus
- in_powo
- infrafamily
- infragenus
- infraspecies
- modified
- name_status
- published
- published_in
- publishing_author
- rank
- scientific_name
- species
- species_author
- version
Author
- forename
- full_name
- standard_form
- surname
Publication
- standard_form
- bph_number
- date
- isbn
- issn
- lc_number
- preceded_by
- superceded_by
- title
- tl2_author
- tl2_number
Filtering
You can filter a given result set by taxonomic rank.
import pykew.ipni as ipni
from pykew.ipni_terms import Filters
res = ipni.search('Poa', filters = Filters.infraspecific)Available Filters
Filters
- familial
- infrafamilial
- generic
- infrageneric
- specific
- infraspecific
Using results
Results sets are returned as an iterator which can be manipulated as you generally would in python. The result object
also implements size() efficiently - it does not fetch all results to count them.
import pykew.ipni as ipni
from pykew.ipni_terms import Name
query = { Name.genus: 'Poa', Name.species: 'annua' }
res = ipni.search(query)
res.size()
[r['name'] for r in res if 'name' in r]POWO
Module for searching POWO data and looking up individual records. Taxonomic data is returned by default, but other associated such as distributions and descriptive text can also be retrieved.
Simple search
import pykew.powo as powo
result = powo.search('Poa annua')Advanced search
import pykew.powo as powo
from pykew.powo_terms import Name
query = { Name.genus: 'Poa', Name.species: 'annua' }
res = powo.search(query)Available Search Terms
To build complex queries, use the search terms available in powo_terms. Query term are grouped into
the modules Name, Characteristic, and Geography.
Name
- full_name
- common_name
- kingdom
- family
- genus
- species
- author
Characteristic
- summary
- appearance
- characteristic
- flower
- fruit
- leaf
- inflorescence
- seed
- cloning
- use
Geography
- distribution
Filtering
You can filter a given result set by accepted taxa, taxa with images, and taxonomic rank.
import pykew.powo as powo
from pykew.powo_terms import Filters
res = powo.search('Poa', filters = [Filters.accepted, Filters.species])Available Filters
Filters
- accepted
- has_images
- families
- genera
- species
- infraspecies
Individual record
import pykew.powo as powo
res = powo.lookup('urn:lsid:ipni.org:names:320035-2')Extra Data
The standard data returned by the POWO api includes taxonomic and nomenclatural information, but there are other data you can request.
Currently you can only retrieve distribution data, but other data should be exposed in the future.
import pykew.powo as powo
res = powo.lookup('urn:lsid:ipni.org:names:320035-2', include=['distribution'])
native_to = [d['name'] for d in res['distribution']['natives']]Using results
Results sets are returned as an iterator which can be manipulated as you generally would in python. The result object
also implements size() efficiently - it does not fetch all results to count them.
import pykew.powo as powo
from pykew.powo_terms import Name, Geography
query = { Name.genus: 'Poa', Geography.distribution: 'Africa' }
res = powo.search(query)
res.size()
[r['name'] for r in res if 'name' in r]
