bw2io.chemidplus

Module Contents

Classes

ChemIDPlus

Use the ChemIDPlus API to lookup synonyms for chemicals, including pesticides.

Functions

canonical_cas(s)

CAS numbers have up to ten digits; we remove zero padding and add hyphens where needed.

Attributes

DIRPATH

exception bw2io.chemidplus.Missing

Bases: Exception

404 or other error code returned.

Parameters

exceptionException

Exception to raise.

Initialize self. See help(type(self)) for accurate signature.

exception bw2io.chemidplus.Multiple

Bases: Exception

Multiple results for given search query.

Parameters

exceptionException

Exception to raise.

Initialize self. See help(type(self)) for accurate signature.

class bw2io.chemidplus.ChemIDPlus

Use the ChemIDPlus API to lookup synonyms for chemicals, including pesticides.

Always used to match against a master list. Seeded with names from ecoinvent.

Attributes

api_cachedict

Dictionary with raw data from API, key is canonical name.

master_mappingdict

Dictionary from synonyms, including canonical names, to master flows.

forbidden_keysset

Identifiers that aren’t unique in the ChemIDPlus system.

Methods

match(synonym, search=True)

Match a synonym to a master flow.

match_cas(number)

Match a CAS number to a master flow.

process_request(request)

Process a request to the ChemIDPlus API.

load_cache()

Load the cache of API results.

save_cache()

Save the cache of API results.

CAS_TEMPLATE = 'https://chem.nlm.nih.gov/api/data/search?data=complete&exp=rn%2Feq%2F{cas}'

NAME_TEMPLATE = 'https://chem.nlm.nih.gov/api/data/search?data=complete&exp=na%2Feq%2F{name}'

add_master_term(term, CAS)

load_cache()

match(synonym, search=True)

match_cas(number)

process_request(response)

save_cache()

bw2io.chemidplus.canonical_cas(s)

CAS numbers have up to ten digits; we remove zero padding and add hyphens where needed.

Parameters

sstr

CAS number.

Returns

str

Canonical CAS number.

bw2io.chemidplus.DIRPATH