mirror of
https://github.com/explosion/spaCy.git
synced 2024-12-26 18:06:29 +03:00
34 lines
1.2 KiB
Python
34 lines
1.2 KiB
Python
'''
|
|
Match a dependency pattern. See https://github.com/explosion/spaCy/pull/1120
|
|
|
|
We start by creating a DependencyTree for the Doc. This class models the document
|
|
dependency tree. Then we compile the query into a Pattern using the PatternParser.
|
|
The syntax is quite simple:
|
|
|
|
we define a node named 'fox', that must match in the dep tree a token
|
|
whose orth_ is 'fox'. an anonymous token whose lemma is 'quick' must have fox
|
|
as parent, with a dep_ matching the regex am.* another anonymous token whose
|
|
orth_ matches the regex brown|yellow has fox as parent, with whathever dep_
|
|
DependencyTree.match returns a list of PatternMatch. Notice that we can assign
|
|
names to anonymous or defined nodes ([word:fox]=f). We can get the Token mapped
|
|
to the fox node using match['f'].
|
|
'''
|
|
import spacy
|
|
from spacy.pattern import PatternParser, DependencyTree
|
|
|
|
nlp = spacy.load('en')
|
|
doc = nlp("The quick brown fox jumped over the lazy dog.")
|
|
tree = DependencyTree(doc)
|
|
|
|
query = """fox [word:fox]=f
|
|
[lemma:quick]=q >/am.*/ fox
|
|
[word:/brown|yellow/] > fox"""
|
|
|
|
pattern = PatternParser.parse(query)
|
|
matches = tree.match(pattern)
|
|
|
|
assert len(matches) == 1
|
|
match = matches[0]
|
|
|
|
assert match['f'] == doc[3]
|