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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_bpe
SPACE = chr(32)
SPACE_ESCAPE = chr(9601)
@register_bpe("characters")
class Characters(object):
def __init__(self, *unused):
pass
@staticmethod
def add_args(parser):
pass
@staticmethod
def encode(x: str) -> str:
escaped = x.replace(SPACE, SPACE_ESCAPE)
return SPACE.join(list(escaped))
@staticmethod
def decode(x: str) -> str:
return x.replace(SPACE, "").replace(SPACE_ESCAPE, SPACE)
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