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Improve matcher example (resolves #3287)

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This commit is contained in:
Ines Montani 2019-02-18 13:26:37 +01:00
parent 660cfe44c5
commit 38e4422c0d
1 changed files with 10 additions and 9 deletions
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website/docs/usage/rule-based-matching.md
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@ -306,28 +306,29 @@ match on the uppercase versions, in case someone has written it as "Google i/o".
### {executable="true"}
import spacy
from spacy.matcher import Matcher
from spacy.tokens import Span
nlp = spacy.load("en_core_web_sm")
matcher = Matcher(nlp.vocab)
# Get the ID of the 'EVENT' entity type. This is required to set an entity.
EVENT = nlp.vocab.strings["EVENT"]
def add_event_ent(matcher, doc, i, matches):
# Get the current match and create tuple of entity label, start and end.
# Append entity to the doc's entity. (Don't overwrite doc.ents!)
match_id, start, end = matches[i]
entity = (EVENT, start, end)
entity = Span(doc, start, end, label="EVENT")
doc.ents += (entity,)
print(doc[start:end].text, entity)
print(entity.text)
matcher.add("GoogleIO", add_event_ent,
[{"ORTH": "Google"}, {"ORTH": "I"}, {"ORTH": "/"}, {"ORTH": "O"}],
[{"ORTH": "Google"}, {"ORTH": "I"}, {"ORTH": "/"}, {"ORTH": "O"}, {"IS_DIGIT": True}],)
doc = nlp(u"This is a text about Google I/O 2015.")
pattern = [{"ORTH": "Google"}, {"ORTH": "I"}, {"ORTH": "/"}, {"ORTH": "O"}]
matcher.add("GoogleIO", add_event_ent, pattern)
doc = nlp(u"This is a text about Google I/O.")
matches = matcher(doc)
```
A very similar logic has been implemented in the built-in
[`EntityRuler`](/api/entityruler) by the way. It also takes care of handling
overlapping matches, which you would otherwise have to take care of yourself.
> #### Tip: Visualizing matches
>
> When working with entities, you can use [displaCy](/api/top-level#displacy) to