wehub-resource-sync
50 lines
1.6 KiB
Python
50 lines
1.6 KiB
Python
# Copyright (c) Facebook, Inc. and its affiliates.
|
|
#
|
|
# This source code is licensed under the MIT license found in the
|
|
# LICENSE file in the root directory of this source tree.
|
|
|
|
from dataclasses import dataclass, field
|
|
|
|
from fairseq.data.encoders import register_tokenizer
|
|
from fairseq.dataclass import FairseqDataclass
|
|
|
|
|
|
@dataclass
|
|
class MosesTokenizerConfig(FairseqDataclass):
|
|
source_lang: str = field(default="en", metadata={"help": "source language"})
|
|
target_lang: str = field(default="en", metadata={"help": "target language"})
|
|
moses_no_dash_splits: bool = field(
|
|
default=False, metadata={"help": "don't apply dash split rules"}
|
|
)
|
|
moses_no_escape: bool = field(
|
|
default=False,
|
|
metadata={"help": "don't perform HTML escaping on apostrophe, quotes, etc."},
|
|
)
|
|
|
|
|
|
@register_tokenizer("moses", dataclass=MosesTokenizerConfig)
|
|
class MosesTokenizer(object):
|
|
def __init__(self, cfg: MosesTokenizerConfig):
|
|
self.cfg = cfg
|
|
|
|
try:
|
|
from sacremoses import MosesTokenizer, MosesDetokenizer
|
|
|
|
self.tok = MosesTokenizer(cfg.source_lang)
|
|
self.detok = MosesDetokenizer(cfg.target_lang)
|
|
except ImportError:
|
|
raise ImportError(
|
|
"Please install Moses tokenizer with: pip install sacremoses"
|
|
)
|
|
|
|
def encode(self, x: str) -> str:
|
|
return self.tok.tokenize(
|
|
x,
|
|
aggressive_dash_splits=(not self.cfg.moses_no_dash_splits),
|
|
return_str=True,
|
|
escape=(not self.cfg.moses_no_escape),
|
|
)
|
|
|
|
def decode(self, x: str) -> str:
|
|
return self.detok.detokenize(x.split())
|