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# 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 fairseq.data.encoders import register_tokenizer
from fairseq.dataclass import FairseqDataclass
@register_tokenizer("nltk", dataclass=FairseqDataclass)
class NLTKTokenizer(object):
def __init__(self, *unused):
try:
from nltk.tokenize import word_tokenize
self.word_tokenize = word_tokenize
except ImportError:
raise ImportError("Please install nltk with: pip install nltk")
def encode(self, x: str) -> str:
return " ".join(self.word_tokenize(x))
def decode(self, x: str) -> str:
return x
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