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sum() is replaced by itertools.chain.from_iterable() #1831

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Merged
thomwolf merged 1 commit into from
Nov 14, 2019
Merged

sum() is replaced by itertools.chain.from_iterable() #1831

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5 changes: 3 additions & 2 deletions transformers/tokenization_utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,7 @@
import json
import six
import copy
import itertools
from io import open

from .file_utils import cached_path, is_tf_available, is_torch_available
Expand Down Expand Up @@ -641,9 +642,9 @@ def split_on_tokens(tok_list, text):
tokenized_text += [sub_text]
text_list = tokenized_text

return sum((self._tokenize(token, **kwargs) if token not \
return list(itertools.chain.from_iterable((self._tokenize(token, **kwargs) if token not \
in self.added_tokens_encoder and token not in self.all_special_tokens \
else [token] for token in tokenized_text), [])
else [token] for token in tokenized_text)))

added_tokens = list(self.added_tokens_encoder.keys()) + self.all_special_tokens
tokenized_text = split_on_tokens(added_tokens, text)
Expand Down