spaCy/spacy/cli/converters/iob2json.py
2019-09-11 11:38:22 +02:00

69 lines
2.3 KiB
Python

# coding: utf8
from __future__ import unicode_literals
from wasabi import Printer
from ...gold import iob_to_biluo
from ...util import minibatch
from .conll_ner2json import n_sents_info
def iob2json(input_data, n_sents=10, *args, **kwargs):
"""
Convert IOB files with one sentence per line and tags separated with '|'
into JSON format for use with train cli. IOB and IOB2 are accepted.
Sample formats:
I|O like|O London|I-GPE and|O New|B-GPE York|I-GPE City|I-GPE .|O
I|O like|O London|B-GPE and|O New|B-GPE York|I-GPE City|I-GPE .|O
I|PRP|O like|VBP|O London|NNP|I-GPE and|CC|O New|NNP|B-GPE York|NNP|I-GPE City|NNP|I-GPE .|.|O
I|PRP|O like|VBP|O London|NNP|B-GPE and|CC|O New|NNP|B-GPE York|NNP|I-GPE City|NNP|I-GPE .|.|O
"""
msg = Printer()
docs = read_iob(input_data.split("\n"))
if n_sents > 0:
n_sents_info(msg, n_sents)
docs = merge_sentences(docs, n_sents)
return docs
def read_iob(raw_sents):
sentences = []
for line in raw_sents:
if not line.strip():
continue
tokens = [t.split("|") for t in line.split()]
if len(tokens[0]) == 3:
words, pos, iob = zip(*tokens)
elif len(tokens[0]) == 2:
words, iob = zip(*tokens)
pos = ["-"] * len(words)
else:
raise ValueError(
"The sentence-per-line IOB/IOB2 file is not formatted correctly. Try checking whitespace and delimiters. See https://spacy.io/api/cli#convert"
)
biluo = iob_to_biluo(iob)
sentences.append(
[
{"orth": w, "tag": p, "ner": ent}
for (w, p, ent) in zip(words, pos, biluo)
]
)
sentences = [{"tokens": sent} for sent in sentences]
paragraphs = [{"sentences": [sent]} for sent in sentences]
docs = [{"id": i, "paragraphs": [para]} for i, para in enumerate(paragraphs)]
return docs
def merge_sentences(docs, n_sents):
merged = []
for group in minibatch(docs, size=n_sents):
group = list(group)
first = group.pop(0)
to_extend = first["paragraphs"][0]["sentences"]
for sent in group:
to_extend.extend(sent["paragraphs"][0]["sentences"])
merged.append(first)
return merged