Merge pull request #252 from rogier-stegeman/fix-empty-list

fix(augmenter/word/random.py): Empty list error

Author: makcedward

nlpaug/augmenter/word/random.py

@@ -36,7 +36,7 @@ def __init__(self, action=Action.DELETE, name='RandomWord_Aug', aug_min=1, aug_m
             tokenizer=tokenizer, reverse_tokenizer=reverse_tokenizer, device='cpu', verbose=verbose,
             stopwords_regex=stopwords_regex, include_detail=False)
 
-        self.target_words = ['_'] if target_words is None else target_words
+        self.target_words = target_words or ['_']
 
     # https://arxiv.org/pdf/1711.02173.pdf, https://arxiv.org/pdf/1809.02079.pdf, https://arxiv.org/pdf/1903.09460.pdf
     def swap(self, data):